Science.gov

Sample records for ytterbium 175

  1. Ytterbium

    SciTech Connect

    1994-01-01

    The crustal abundance of ytterbium amounts to three parts per million, the same as tin, bromine and boron, and just above uranium, beryllium and arsenic. Ytterbium occurs as a minor to moderate constituent in most of the rare earth minerals. The apparent ytterbium contents of these various minerals in combination with production data for the countries involved provide the basis for calculation of the production potential for ytterbium. This potential amounts to about 40 tons per year. Much of this potential is unrealized, however, since ytterbium is only recovered when: (1) Markets exist in which it can be sold, (2) The sales price exceeds the cost of production.

  2. Preparation, Biological Evaluation and Dosimetry Studies of 175Yb-Bis-Phosphonates for Palliative Treatment of Bone Pain

    PubMed Central

    Fakhari, Ashraf; Jalilian, Amir R.; Yousefnia, Hassan; Shanehsazzadeh, Saeed; Samani, Ali Bahrami; Daha, Fariba Johari; Ardestani, Mehdi Shafiee; Khalaj, Ali

    2015-01-01

    Objective: Optimized production and quality control of ytterbium-175 (Yb-175) labeled pamidronate and alendronate complexes as efficient agents for bone pain palliation has been presented. Methods: Yb-175 labeled pamidronate and alendronate (175Yb-PMD and 175Yb-ALN) complexes were prepared successfully at optimized conditions with acceptable radiochemical purity, stability and significant hydroxyapatite absorption. The biodistribution of complexes were evaluated up to 48 h, which demonstrated significant bone uptake ratios for 175Yb-PAM at all-time intervals. It was also detected that 175Yb-PAM mostly washed out and excreted through the kidneys. Results: The performance of 175Yb-PAM in an animal model was better or comparable to other 175Yb-bone seeking complexes previously reported. Conclusion: Based on calculations, the total body dose for 175Yb-ALN is 40% higher as compared to 175Yb-PAM (especially kidneys) indicating that 175Yb-PAM is probably a safer agent than 175Yb-ALN. PMID:27529886

  3. Controlling interactions in ultracold fermionic ytterbium-173

    NASA Astrophysics Data System (ADS)

    Höfer, Moritz; Riegger, Luis; Hofrichter, Chrisitian; Rio Fernandes, Diogo; Bloch, Immanuel; Fölling, Simon

    2016-05-01

    The possibility to tune the interactions of ultracold atomic gases with an external magnetic field has become a vital tool for many quantum gas experiments. For fermionic ytterbium-173 both the 1 S0 ground state and 3 P0 metastable state have vanishing angular momentum J = 0 and therefore no magnetic Feshbach resonances are expected. Here we report on the discovery of a novel type of Feshbach resonance, which was predicted to exist due to orbital-mixing interactions. It occurs universally for all hyperfine-state combinations of ytterbium-173 and is located at experimentally accessible magnetic fields. The scattering properties are characterized by inter-orbital cross-thermalization measurements in the bulk as well as high resolution clock-line spectroscopy in a three-dimensional lattice. Furthermore, we study the dynamics of a strongly interacting two-orbital quantum gas in two dimensions.

  4. Ubiquitous Magnetic Excitations in the Ytterbium Pyrochlores

    NASA Astrophysics Data System (ADS)

    Hallas, Alannah; Gaudet, Jonathan; Butch, Nicholas; Tachibana, Makoto; Freitas, Rafael; Wiebe, Chris; Luke, Graeme; Gaulin, Bruce

    The ytterbium pyrochlores, Yb2B2O7 (B = Sn, Ti, Ge) are well described in terms of Seff = 1/2 quantum spins with local XY anisotropy, decorating the cubic pyrochlore lattice and interacting via anisotropic exchange. While structurally only the non-magnetic B-site cation, and hence, primarily the lattice parameter, is changing across the series Yb2B2O7 (B = Sn, Ti, Ge), a range of magnetic behavior is observed. The low temperature magnetism in Yb2Ti2O7 and Yb2Sn2O7 has ferromagnetic character. Conversely, Yb2Ge2O7 displays an antiferromagnetically ordered Neel state at low temperatures. We present a comparative analysis of the spin dynamic properties of these three systems using inelastic neutron scattering. While the static properties of the ytterbium pyrochlores are distinct from one another, we find a ubiquitous character to the spin dynamics. The inelastic scattering for each of these ytterbium pyrochlores show a gapless continuum of spin excitations, that tends to resemble over-damped ferromagnetic spin waves at low Q. Furthermore, the specific heat for each of these materials follows a common form with a broad, high-temperature anomaly followed by a sharp low-temperature anomaly. We find that the dynamic properties correlate strongly with the broad specific heat anomaly but remain unchanged across the sharp, low temperature specific heat anomaly.

  5. New data on activation cross section for deuteron induced reactions on ytterbium up to 50 MeV

    NASA Astrophysics Data System (ADS)

    Tárkányi, F.; Ditrói, F.; Takács, S.; Hermanne, A.; Ignatyuk, A. V.

    2014-10-01

    Activation cross sections of deuteron induced reactions on ytterbium for production of 177g,173,172,171,170,169,167Lu, 177,175,169Yb and 173,168,167,165Tm were extended up to 50 MeV deuteron energy. The new data are in acceptable agreement with the earlier experimental data in the overlapping energy region. The experimental data are compared with the predictions of the ALICE-D, EMPIRE-D and TALYS 1.4 (TENDL-2013 on-line library results) codes.

  6. Dielectric and magnetic anisotropy of a nematic ytterbium complex

    SciTech Connect

    Dobrun, L. A. Sakhatskii, A. S.; Kovshik, A. P.; Ryumtsev, E. I.; Kolomiets, I. P.; Knyazev, A. A.; Galyametdinov, Yu. G.

    2015-05-15

    The sign and the magnitude of the dielectric anisotropy of an ytterbium-based paramagnetic nematic liquid crystal complex, namely, tris[1-(4-(4-propylcyclohexyl)phenyl)octane-1,3-dione]-[5,5'-di (heptadecile)-2,2'-bipyridine]ytterbium, are determined. The temperature dependence of the permittivity components of the complex is obtained in the temperature range of a nematic phase. The sign of the anisotropy of the magnetic susceptibility of this compound is experimentally determined.

  7. A quantum gas microscope for ytterbium atoms

    NASA Astrophysics Data System (ADS)

    Takahashi, Yoshiro

    2016-05-01

    In this talk, I report on the development of a quantum gas microscope for ytterbium (Yb) atoms. By using a dual molasses technique in which 399 nm molasses beams of the broad singlet transition are applied for fluorescence imaging and 556 nm molasses beams of the narrow intercombination transition are applied for cooling during the imaging, we successfully demonstrate site-resolved imaging of individual bosonic 174 Yb atoms in a two-dimensional optical lattice with a lattice constant of 266 nm.We also apply a high resolution laser spectroscopy using the ultranarrow intercombination transition between the 1 S0 and 3 P2 states to manipulate an atom distribution in an optical lattice. We expect the demonstrated technique will similarly work for other isotopes of Yb atoms. We are also developing a different mode of an Yb quantum gas microscope.

  8. Radiation effects on ytterbium-doped optical fibers

    NASA Astrophysics Data System (ADS)

    Singleton, Briana J.

    Assuming on-board satellite high-bandwidth communications will utilize passive optical fibers as a communication channel, this work focused on the impact of gamma and mixed gamma/neutron radiation on transmission through single-mode and multi-mode ytterbium-doped single-mode fibers operated as amplifiers for a 1060-nm light source. Standard optical patch cables were evaluated along with active ytterbium -doped double-clad fibers in the same radiation environment. Exposure times and signal transmission wavelength variations were used to investigate the degradation of the fibers exposed to total doses above 100 krad(Si). Further, the effect on the amplified signal gain was studied for the ytterbium -doped fibers. The increased attenuation in the fibers across a broad wavelength range in response to multiple levels of gamma radiation exposure, along with the effect that increased attenuation has on the actively pumped ytterbium -doped fiber amplifier performance was evaluated. Ytterbium-doped optical fibers demonstrate sensitivity to gamma and mixed neutron/gamma radiation exposures that is independent of the operational configuration of the fiber during irradiation. No identifiable dose rate damage production mechanism was encountered. However, fiber damage recovery following irradiation was found to be dependent on the radiation dose rate.

  9. Quantum gas microscopy of ytterbium: cool me twice

    NASA Astrophysics Data System (ADS)

    Vengalattore, Mukund

    2016-03-01

    The site-resolved detection of ultracold atoms in optical lattice potentials is a powerful technique to study lattice models of correlated quantum matter. In their recent paper, Yamamoto et al (2016 New J. Phys. 18 023016) demonstrate a quantum gas microscope for ultracold ytterbium atoms. By simultaneously cooling these atoms on two optical transitions, they show that fluorescent images of the lattice gas can be obtained while keeping the atoms pinned to their lattice sites even for a lattice spacing as small as 266 nm. This promises to be a powerful enabling tool for studies of metrology and quantum magnetism with quantum degenerate gases of ytterbium.

  10. All-fibre ytterbium laser tunable within 45 nm

    SciTech Connect

    Abdullina, S R; Babin, S A; Vlasov, A A; Kablukov, S I; Shelemba, I S; Kurkov, A S

    2007-12-31

    A tunable ytterbium-doped fibre laser is fabricated. The laser is tuned by using a tunable fibre Bragg grating (FBG) as a selecting intracavity element. The laser is tunable within 45 nm (from 1063 to 1108 nm) and emits {approx}6 W in the line of width {approx}0.15 nm, the output power and linewidth being virtually invariable within the tuning range. The method is proposed for synchronous tuning the highly reflecting and output FBGs, and a tunable ytterbium all-fibre laser is built. (lasers)

  11. Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

    SciTech Connect

    Fry, C.; Thoennessen, M.

    2013-09-15

    Currently, thirty-one dysprosium, thirty-two holmium, thirty-two erbium, thirty-three thulium, and thirty-one ytterbium isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  12. Gain measurements at 5 nm in nickel-like ytterbium

    SciTech Connect

    MacGowan, B.J.; Bourgade, J.L.; Combis, P.; Keane, C.J.; Louis-Jacquet, M.; Matthews, D.L.; Naccache, D.; Stone, G.; Thiell, G.; Whelan, D.A.

    1988-03-01

    Soft x-ray gain has been demonstrated at 5.03 nm within a laser produced plasma of Ni-like ytterbium. Experiments will also be described with higher Z Ni-like ions which can produce even shorter wavelength x-ray laser transition. 3 refs.

  13. 33 CFR 175.115 - Exceptions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.115 Exceptions. The following persons need not comply with § 175.110; however, each must carry on board visual distress signals suitable...

  14. 33 CFR 175.115 - Exceptions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.115 Exceptions. The following persons need not comply with § 175.110; however, each must carry on board visual distress signals suitable...

  15. 33 CFR 175.125 - Serviceability.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.125 Serviceability. No person may use a boat unless each signal required by § 175.110 is in serviceable condition and the service life...

  16. 33 CFR 175.125 - Serviceability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.125 Serviceability. No person may use a boat unless each signal required by § 175.110 is in serviceable condition and the service life...

  17. 33 CFR 175.125 - Serviceability.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.125 Serviceability. No person may use a boat unless each signal required by § 175.110 is in serviceable condition and the service life...

  18. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2014-04-01 2014-04-01 false Dos Rios. 9.175 Section 9.175 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY ALCOHOL AMERICAN VITICULTURAL AREAS Approved American Viticultural Areas § 9.175 Dos Rios. (a) Name. The name of the viticultural...

  19. 25 CFR 175.32 - Collections.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Collections. 175.32 Section 175.32 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.32 Collections. The utility shall attempt collection on checks returned...

  20. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  1. 33 CFR 175.101 - Applicability.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Applicability. 175.101 Section 175.101 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.101 Applicability. This...

  2. 33 CFR 175.120 - Stowage.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Stowage. 175.120 Section 175.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.120 Stowage. No person may use a boat unless the...

  3. 33 CFR 175.125 - Serviceability.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Serviceability. 175.125 Section 175.125 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.125 Serviceability. No person may...

  4. 46 CFR 108.175 - Contiguous locations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as...

  5. 46 CFR 108.175 - Contiguous locations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as...

  6. 46 CFR 108.175 - Contiguous locations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as...

  7. 46 CFR 108.175 - Contiguous locations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as...

  8. 46 CFR 108.175 - Contiguous locations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Contiguous locations. 108.175 Section 108.175 Shipping... EQUIPMENT Construction and Arrangement Classified Locations § 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as...

  9. 33 CFR 175.101 - Applicability.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Applicability. 175.101 Section 175.101 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.101 Applicability. This...

  10. 33 CFR 175.120 - Stowage.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Stowage. 175.120 Section 175.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.120 Stowage. No person may use a boat unless the...

  11. 33 CFR 175.125 - Serviceability.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Serviceability. 175.125 Section 175.125 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.125 Serviceability. No person may...

  12. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  13. 40 CFR 96.175 - Petitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Petitions. 96.175 Section 96.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS FOR STATE IMPLEMENTATION PLANS Monitoring and Reporting § 96.175 Petitions. (a) Except...

  14. 31 CFR 103.175 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... the United States Code. For purposes of this paragraph (j), the definition of person in § 103.11(z... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Definitions. 103.175 Section 103.175... Correspondent Accounts and Private Banking Accounts § 103.175 Definitions. Except as otherwise provided,...

  15. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  16. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  17. 33 CFR 175.105 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Definitions. 175.105 Section 175.105 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.105 Definitions. (a) Visual distress signal means a device that is approved by...

  18. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  19. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  20. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  1. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  2. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  3. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  4. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  5. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  6. 25 CFR 175.51 - Ownership.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Ownership. 175.51 Section 175.51 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.51 Ownership. All rights-of-way, material, or equipment furnished and/or installed by a customer pursuant...

  7. 2 CFR 175.25 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Definitions. 175.25 Section 175.25 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS AWARD TERM FOR TRAFFICKING IN PERSONS § 175.25 Definitions. Terms used in this part...

  8. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Policy. 175.101 Section 175.101 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS OPM MANDATORY REVIEW OF CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for...

  9. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 1 2013-01-01 2013-01-01 false Policy. 175.101 Section 175.101 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS OPM MANDATORY REVIEW OF CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for...

  10. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 1 2014-01-01 2014-01-01 false Policy. 175.101 Section 175.101 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS OPM MANDATORY REVIEW OF CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for...

  11. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Policy. 175.101 Section 175.101 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS OPM MANDATORY REVIEW OF CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for...

  12. 25 CFR 175.3 - Compliance.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part....

  13. 25 CFR 175.3 - Compliance.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part....

  14. 25 CFR 175.3 - Compliance.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part....

  15. 25 CFR 175.3 - Compliance.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part....

  16. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... UNDER THE FOREIGN SERVICE RETIREMENT AND DISABILITY SYSTEM (FSRDS) AND THE FOREIGN SERVICE PENSION SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Financial hardship. 17.5 Section 17.5...

  17. 24 CFR 17.5 - Investigations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Investigations. 17.5 Section 17.5 Housing and Urban Development Office of the Secretary, Department of Housing and Urban Development ADMINISTRATIVE CLAIMS Claims Against Government Under Federal Tort Claims Act Procedures § 17.5...

  18. 24 CFR 17.5 - Investigations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Investigations. 17.5 Section 17.5 Housing and Urban Development Office of the Secretary, Department of Housing and Urban Development ADMINISTRATIVE CLAIMS Claims Against Government Under Federal Tort Claims Act Procedures § 17.5...

  19. 49 CFR 175.30 - Inspecting shipments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Inspecting shipments. 175.30 Section 175.30 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.30...

  20. 49 CFR 175.30 - Inspecting shipments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Inspecting shipments. 175.30 Section 175.30 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.30...

  1. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following...

  2. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following...

  3. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following...

  4. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following...

  5. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES GREAT LAKES LOAD LINES Unmanned River Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following...

  6. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 22 Foreign Relations 1 2013-04-01 2013-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior to receipt and evaluation of a completed Statement of Financial Status, duly sworn by the...

  7. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 22 Foreign Relations 1 2014-04-01 2014-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior to receipt and evaluation of a completed Statement of Financial Status, duly sworn by the...

  8. 49 CFR 175.30 - Inspecting shipments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Inspecting shipments. 175.30 Section 175.30... Information and Regulations § 175.30 Inspecting shipments. (a) No person may accept a hazardous material for... certified on a shipping paper prepared in duplicate in accordance with part 172 of this subchapter or...

  9. 49 CFR 175.30 - Inspecting shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Inspecting shipments. 175.30 Section 175.30... Information and Regulations § 175.30 Inspecting shipments. (a) No person may accept a hazardous material for... certified on a shipping paper prepared in duplicate in accordance with part 172 of this subchapter or...

  10. 25 CFR 175.51 - Ownership.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Ownership. 175.51 Section 175.51 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.51 Ownership. All rights-of-way, material, or equipment furnished and/or installed by a customer pursuant...

  11. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Customer responsibilities. 175.23 Section 175.23 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.23 Customer responsibilities. The customer(s) of a utility subject...

  12. 25 CFR 175.3 - Compliance.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Compliance. 175.3 Section 175.3 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.3 Compliance. All utility customers and the utilities are bound by the rule in this part....

  13. 25 CFR 175.20 - Gratuities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Gratuities. 175.20 Section 175.20 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.20 Gratuities. All employees of the utility are forbidden to accept from a customer...

  14. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  15. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  16. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  17. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION Food Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified foods in accordance with...

  18. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  19. 25 CFR 175.5 - Operations manual.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Operations manual. 175.5 Section 175.5 Indians BUREAU OF... Provisions § 175.5 Operations manual. (a) The Area Director shall establish an operations manual for the... Director shall amend the operations manual as needed. (b) The public shall be notified by the Area...

  20. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 1 2012-10-01 2011-10-01 true Compliance information. 17.5 Section 17.5... Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee shall to the fullest extent practicable seek the cooperation of recipients in obtaining compliance...

  1. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 1 2014-10-01 2014-10-01 false Compliance information. 17.5 Section 17.5... Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee shall to the fullest extent practicable seek the cooperation of recipients in obtaining compliance...

  2. 21 CFR 169.175 - Vanilla extract.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 2 2012-04-01 2012-04-01 false Vanilla extract. 169.175 Section 169.175 Food and... § 169.175 Vanilla extract. (a) Vanilla extract is the solution in aqueous ethyl alcohol of the sapid and odorous principles extractable from vanilla beans. In vanilla extract the content of ethyl alcohol is...

  3. 21 CFR 169.175 - Vanilla extract.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Vanilla extract. 169.175 Section 169.175 Food and... § 169.175 Vanilla extract. (a) Vanilla extract is the solution in aqueous ethyl alcohol of the sapid and odorous principles extractable from vanilla beans. In vanilla extract the content of ethyl alcohol is...

  4. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  5. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  6. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  7. 33 CFR 175.201 - Ventilation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... unless it is equipped with an operable ventilation system that meets the requirements of 33 CFR 183.610... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Ventilation. 175.201 Section 175... SAFETY EQUIPMENT REQUIREMENTS Ventilation § 175.201 Ventilation. No person may operate a boat built...

  8. 40 CFR 80.175 - [Reserved

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 17 2014-07-01 2014-07-01 false 80.175 Section 80.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) REGULATION OF FUELS AND FUEL ADDITIVES Detergent Gasoline § 80.175...

  9. Low frequency noise distributed-feedback ytterbium fibre laser

    SciTech Connect

    Nikulin, M A; Babin, S A; Kablukov, S I; Dmitriev, Aleksandr K; Dychkov, Aleksandr S; Lugovoy, Aleksei A; Pecherskii, Yu Ya

    2009-10-31

    We report a single-frequency 1-W fibre laser source emitting at 1093 nm, composed of a distributed-feedback ytterbium fibre laser and fibre-optic amplifier. The laser frequency was stabilised by side-locking to a transmission peak of a Fabry - Perot interferometer, and the residual frequency noise spectrum of the laser was measured. Our results indicate that the laser linewidth can be narrowed down below 1 kHz. (lasers)

  10. Strongly interacting ultracold quantum gases of fermionic ytterbium-173

    NASA Astrophysics Data System (ADS)

    Höfer, Moritz; Riegger, Luis; Hofrichter, Chrisitian; Rio Fernandes, Diogo; Fölling, Simon; Bloch, Immanuel

    2016-05-01

    In contrast to the more common alkali atoms, alkaline-earth-like ytterbium features a strong decoupling between the nuclear and the electronic spin degree of freedom and possesses a metastable excited state. The decoupling gives rise to an extended SU(N)-symmetry with N <= 6 for ytterbium-173. This enables us to study the SU(N)-symmetric Fermi-Hubbard model in a three-dimensional optical lattice. We prepare a low-temperature SU(N)-symmetric Mott insulator and characterize the Mott crossover. High local resolution allows us to extract the equation of state for a large range of interactions. In a second experiment, we investigate the scattering properties between the 1 S0 ground state and 3 P0 metastable state, where the interactions cannot be tuned with standard magnetic Feshbach resonances as in alkalis. We report on the discovery of a new orbital interaction-induced Feshbach resonance in ytterbium-173, permitting tunable interactions between these two states.

  11. Controlling energy transfer in ytterbium complexes: oxygen dependent lanthanide luminescence and singlet oxygen formation.

    PubMed

    Watkis, Andrew; Hueting, Rebekka; Sørensen, Thomas Just; Tropiano, Manuel; Faulkner, Stephen

    2015-11-01

    Pyrene-appended ytterbium complexes have been prepared using Ugi reactions to vary the chromophore-lanthanide separation. Formation of the ytterbium(iii) excited state is sensitised via both the singlet and triplet excited states of the chromophore. Energy transfer from the latter is relatively slow, and gives rise to oxygen-dependent luminescence. PMID:26346499

  12. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  13. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true P-4000. 189.175 Section 189.175 Food and Drugs FOOD... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  14. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  15. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  16. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs....175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n-propoxyaniline, C9H12N2O3. It is a synthetic... containing any added or detectable level of P-4000 is deemed to be adulterated in violation of the act...

  17. Luminescence and photoinduced absorption in ytterbium-doped optical fibres

    SciTech Connect

    Rybaltovsky, A A; Aleshkina, S S; Likhachev, M E; Bubnov, M M; Umnikov, A A; Yashkov, M V; Gur'yanov, Aleksei N; Dianov, Evgenii M

    2011-12-31

    Photochemical reactions induced in the glass network of an ytterbium-doped fibre core by IR laser pumping and UV irradiation have been investigated by analysing absorption and luminescence spectra. We have performed comparative studies of the photoinduced absorption and luminescence spectra of fibre preforms differing in core glass composition: Al{sub 2}O{sub 3} : SiO{sub 2}, Al{sub 2}O{sub 3} : Yb{sub 2}O{sub 3} : SiO{sub 2}, and P{sub 2}O{sub 5} : Yb{sub 2}O{sub 3} : SiO{sub 2}. The UV absorption spectra of unirradiated preform core samples show strong bands peaking at 5.1 and 6.5 eV, whose excitation plays a key role in photoinduced colour centre generation in the glass network. 'Direct' UV excitation of the 5.1- and 6.5-eV absorption bands at 244 and 193 nm leads to the reduction of some of the Yb{sup 3+} ions to Yb{sup 2+}. The photodarkening of ytterbium-doped fibres by IR pumping is shown to result from oxygen hole centre generation. A phenomenological model is proposed for the IR-pumping-induced photodarkening of ytterbium-doped fibres. The model predicts that colour centre generation in the core glass network and the associated absorption in the visible range result from a cooperative effect involving simultaneous excitation of a cluster composed of several closely spaced Yb{sup 3+} ions.

  18. 21 CFR 137.175 - Phosphated flour.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Phosphated flour. 137.175 Section 137.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION CEREAL FLOURS AND RELATED PRODUCTS Requirements for Specific Standardized Cereal Flours...

  19. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Adhesives. 175.105 Section 175.105 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives §...

  20. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Adhesives. 175.105 Section 175.105 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives §...

  1. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2012-10-01 2012-10-01 false Plutonium shipments. 175.704 Section...

  2. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2014-10-01 2014-10-01 false Plutonium shipments. 175.704 Section...

  3. 40 CFR 161.175 - Certified limits.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 24 2011-07-01 2011-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements §...

  4. 40 CFR 161.175 - Certified limits.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 25 2013-07-01 2013-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements §...

  5. Nuclear Data Sheets for A=175

    SciTech Connect

    Basunia, M. Shamsuzzoha

    2004-07-15

    Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for all nuclei with mass number A = 175. This evaluation for A = 175 supersedes the earlier one by A.O. Macchiavelli and E. Browne (1993Ma79), published in Nuclear Data Sheets 69, 903 (1993). Highlights of this publication are the following: 1) This evaluation includes the first study (1996Zh03) of 175Er β− decay, which has been used to interpret a predicted ground state doublet in 175Tm; 2) The deep-inelastic reaction studies (1999As05, 1997Le11, and 1997Le10) extended the yrast band of 175Yb to the image level at 4426 keV; 3) New studies (1994Mi04) of 175Yb β− decay have provided significantly more precise γ-ray intensities; 4) New data (2002Ro17 and 1998To14) from the alpha decay of 179Tl have been used for tentatively assigning spin and parity to 175Au ground and first-excited states. Tentative assignment of 175Hg g.s. is adopted from 176Tl proton decay (2004Ke06).

  6. 21 CFR 558.175 - Clopidol.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Clopidol. 558.175 Section 558.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS Specific New Animal Drugs for Use...

  7. 21 CFR 558.175 - Clopidol.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 6 2013-04-01 2013-04-01 false Clopidol. 558.175 Section 558.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS Specific New Animal Drugs for Use...

  8. 21 CFR 558.175 - Clopidol.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 6 2011-04-01 2011-04-01 false Clopidol. 558.175 Section 558.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS Specific New Animal Drugs for Use...

  9. 21 CFR 558.175 - Clopidol.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 6 2012-04-01 2012-04-01 false Clopidol. 558.175 Section 558.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS Specific New Animal Drugs for Use...

  10. 21 CFR 558.175 - Clopidol.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 6 2014-04-01 2014-04-01 false Clopidol. 558.175 Section 558.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS Specific New Animal Drugs for Use...

  11. 7 CFR 1.75 - General stipulations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 1 2013-01-01 2013-01-01 false General stipulations. 1.75 Section 1.75 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Cooperative Production of Television... direct or implied, by the U.S. Department of Agriculture or its agencies, of the sponsor's product....

  12. 25 CFR 175.20 - Gratuities.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Gratuities. 175.20 Section 175.20 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service... personal compensation or gratuity rendered related to employment by the utility....

  13. 25 CFR 175.20 - Gratuities.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Gratuities. 175.20 Section 175.20 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service... personal compensation or gratuity rendered related to employment by the utility....

  14. 25 CFR 175.20 - Gratuities.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Gratuities. 175.20 Section 175.20 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service... personal compensation or gratuity rendered related to employment by the utility....

  15. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 1 2013-10-01 2013-10-01 false Compliance information. 17.5 Section 17.5 Public Lands: Interior Office of the Secretary of the Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or...

  16. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2013-10-01 2013-10-01 false Plutonium shipments. 175.704 Section...

  17. 25 CFR 175.6 - Information collection.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Information collection. 175.6 Section 175.6 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... assigned clearance number 1076-0021. This information is being collected to provide electric power...

  18. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  19. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  20. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  1. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  2. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  3. 7 CFR 65.175 - Ground pork.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 3 2012-01-01 2012-01-01 false Ground pork. 65.175 Section 65.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE...

  4. 7 CFR 65.175 - Ground pork.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 3 2013-01-01 2013-01-01 false Ground pork. 65.175 Section 65.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE...

  5. 7 CFR 65.175 - Ground pork.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 3 2014-01-01 2014-01-01 false Ground pork. 65.175 Section 65.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE...

  6. 7 CFR 65.175 - Ground pork.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Ground pork. 65.175 Section 65.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE...

  7. 7 CFR 65.175 - Ground pork.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 3 2011-01-01 2011-01-01 false Ground pork. 65.175 Section 65.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) REGULATIONS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE...

  8. 49 CFR 173.175 - Permeation devices.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Permeation devices. 173.175 Section 173.175... Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air quality monitoring devices are not subject to the requirements of this subchapter provided the...

  9. 40 CFR 161.175 - Certified limits.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 25 2012-07-01 2012-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements §...

  10. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2011-10-01 2011-10-01 false Plutonium shipments. 175.704 Section...

  11. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2010-10-01 2010-10-01 false Plutonium shipments. 175.704 Section...

  12. Optimierung und Charakterisierung einer transportablen optischen Gitteruhr mit Ytterbium

    NASA Astrophysics Data System (ADS)

    Mura, Gregor

    2015-08-01

    This thesis deals with the improvement and the characterization of a transportable optical lattice clock with ytterbium. Building on results of former theses from T. Franzen [1] and C. Abou Jadoudeh [2] numerous improvements were needed to increase the overall stability of the whole apparatus. The improved stability should lead to a more accurate characterization of the system and a better mobility. Finally, the apparatus should be transported to the Instituto Nationale di Ricerca Metrologica (INRIM) in Torino (Italy) in the course of the Space Optical Clocks 2 (SOC2) project.(Abridged)

  13. Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon.

    PubMed

    Aghajani, A; Murugan, G S; Sessions, N P; Apostolopoulos, V; Wilkinson, J S

    2015-06-01

    A waveguide laser in an ytterbium-doped tantalum pentoxide film is reported. The waveguide is formed of a rib of sputtered tantalum pentoxide on top of oxidized silicon with an over-cladding of silica. Emission at a wavelength of 1025 nm was achieved with an absorbed pump power threshold and slope efficiency of ≈29  mW and 27%, respectively, for a cavity formed by a high reflector mirror and an estimated 12% Fresnel reflection from the bare end-face at the output. PMID:26030554

  14. Observation of a Large Atomic Parity Violation Effect in Ytterbium

    SciTech Connect

    Tsigutkin, K.; Dounas-Frazer, D.; Family, A.; Stalnaker, J. E.; Yashchuk, V. V.; Budker, D.

    2009-08-14

    Atomic parity violation has been observed in the 6s{sup 2} {sup 1}S{sub 0}->5d6s {sup 3}D{sub 1} 408-nm forbidden transition of ytterbium. The parity-violating amplitude is found to be 2 orders of magnitude larger than in cesium, where the most precise experiments to date have been performed. This is in accordance with theoretical predictions and constitutes the largest atomic parity-violating amplitude yet observed. This also opens the way to future measurements of neutron distributions and anapole moments by comparing parity-violating amplitudes for various isotopes and hyperfine components of the transition.

  15. Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

    NASA Technical Reports Server (NTRS)

    Good, Brian S.

    2015-01-01

    Ytterbium disilicate is of interest as a potential environmental barrier coating for aerospace applications, notably for use in next generation jet turbine engines. In such applications, the transport of oxygen and water vapor through these coatings to the ceramic substrate is undesirable if high temperature oxidation is to be avoided. In an effort to understand the diffusion process in these materials, we have performed kinetic Monte Carlo simulations of vacancy-mediated and interstitial oxygen diffusion in Ytterbium disilicate. Oxygen vacancy and interstitial site energies, vacancy and interstitial formation energies, and migration barrier energies were computed using Density Functional Theory. We have found that, in the case of vacancy-mediated diffusion, many potential diffusion paths involve large barrier energies, but some paths have barrier energies smaller than one electron volt. However, computed vacancy formation energies suggest that the intrinsic vacancy concentration is small. In the case of interstitial diffusion, migration barrier energies are typically around one electron volt, but the interstitial defect formation energies are positive, with the result that the disilicate is unlikely to exhibit experience significant oxygen permeability except at very high temperature.

  16. 33 CFR 175.140 - Prohibited use.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.140 Prohibited use. No person in a boat shall display a visual distress signal on waters to which this subpart applies under...

  17. 33 CFR 175.140 - Prohibited use.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.140 Prohibited use. No person in a boat shall display a visual distress signal on waters to which this subpart applies under...

  18. 33 CFR 175.23 - Serviceable condition.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.23 Serviceable condition. A PFD is...) Inflator status indicators that are not broken or otherwise non-functional. (d) The inflation system of...

  19. Photonic bandgap single-mode optical fibre with ytterbium-doped silica glass core

    SciTech Connect

    Egorova, O N; Semenov, S L; Vel'miskin, V V; Dianov, Evgenii M; Salganskii, M Yu; Yashkov, M V; Gur'yanov, Aleksei N

    2011-01-24

    A photonic bandgap fibre with an ytterbium-doped silica glass core is fabricated and investigated. The possibility of implementing single-mode operation of such fibres in a wide spectral range at a large (above 20 {mu}m) mode field diameter makes them promising for fibre lasers and amplifiers. To ensure a high quality of the beam emerging from the fibre, particular attention is paid to increasing the optical homogeneity of the ytterbium-doped core glass. (optical fibres)

  20. Double nanosecond pulses generation in ytterbium fiber laser.

    PubMed

    Veiko, V P; Lednev, V N; Pershin, S M; Samokhvalov, A A; Yakovlev, E B; Zhitenev, I Yu; Kliushin, A N

    2016-06-01

    Double pulse generation mode for nanosecond ytterbium fiber laser was developed. Two sequential 60-200 ns laser pulses with variable delay between them were generated by acousto-optic modulator opening with continuous diode pumping. A custom radio frequency generator was developed to produce two sequential "opening" radio pulses with a delay of 0.2-1 μs. It was demonstrated that double pulse generation did not decrease the average laser power while providing the control over the laser pulse power profile. Surprisingly, a greater peak power in the double pulse mode was observed for the second laser pulse. Laser crater studies and plasma emission measurements revealed an improved efficiency of laser ablation in the double pulse mode. PMID:27370433

  1. Spectroscopic properties of lead fluoroborate glasses doped with ytterbium.

    PubMed

    Kassab, L; Tatumi, S; Morais, A; Courrol, L; Wetter, N; Salvador, V

    2001-05-01

    A new lead fluoroborate glass (PbO-PbF2-B2O3) doped with ytterbium (Yb:PbFB) is presented. Samples with different concentrations of Yb3+ were produced and had their emission cross-sections, fluorescence lifetimes and minimum pump intensities determined. They have high refractive index of 2.2 and a density of 4.4 g/cm3. For a doping level of 1.153x1020 ions/cm3, the fluorescence lifetime, after excitation at 968 nm, is 0.81 ms, which is comparable to Yb:tellurite laser glass. Also, an emission band at 1022 nm is measured with emission cross-section of approximately 1.07x10-20 cm2 and fluorescence effective linewidth of 60 nm, which is comparable to Yb:phosphate laser glass. PMID:19417856

  2. Calculation of electron scattering from the ground state of ytterbium

    SciTech Connect

    Bostock, Christopher J.; Fursa, Dmitry V.; Bray, Igor

    2011-05-15

    We report on the application of the convergent close-coupling method, in both relativistic and nonrelativistic formulations, to electron scattering from ytterbium. Angle-differential and integrated cross sections are presented for elastic scattering and excitation of the states (6s6p){sup 3}P{sub 0,1,2}, (6s6p){sup 1}P{sub 1}{sup o}, (6s7p){sup 1}P{sub 1}{sup o}, and (6s5d){sup 1}D{sub 2}{sup e} for a range of incident electron energies. We also present calculations of the total cross section, and angle-differential Stokes parameters for excitation of the (6s6p){sup 3}P{sub 1}{sup o} state from the ground state. A comparison is made with the relativistic distorted-wave method and experiments.

  3. Double nanosecond pulses generation in ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Veiko, V. P.; Lednev, V. N.; Pershin, S. M.; Samokhvalov, A. A.; Yakovlev, E. B.; Zhitenev, I. Yu.; Kliushin, A. N.

    2016-06-01

    Double pulse generation mode for nanosecond ytterbium fiber laser was developed. Two sequential 60-200 ns laser pulses with variable delay between them were generated by acousto-optic modulator opening with continuous diode pumping. A custom radio frequency generator was developed to produce two sequential "opening" radio pulses with a delay of 0.2-1 μs. It was demonstrated that double pulse generation did not decrease the average laser power while providing the control over the laser pulse power profile. Surprisingly, a greater peak power in the double pulse mode was observed for the second laser pulse. Laser crater studies and plasma emission measurements revealed an improved efficiency of laser ablation in the double pulse mode.

  4. Passive mode locking in erbium-ytterbium fiber lasers

    NASA Astrophysics Data System (ADS)

    Thai, Serey; Hayduk, Michael J.

    1999-11-01

    A novel mode-locked erbium-ytterbium fiber laser operating at 1550 nm using multiple quantum well (MQW) saturable absorbers was developed. The laser was constructed in a Fabry-Perot configuration using a fiber Bragg grating as a front reflector and a fiber Bragg grating output as a back reflector of the laser cavity. The passive mode-locking element placed inside the laser cavity is a 75 period InGaAs/InAlAs MQW saturable absorber grown lattice matched on an InP substrate. The output of the laser was taken through the other available port of a wavelength-division demultiplexer. The laser produced mode-locked output pulse trains at 16.67-MHz repetition rate and 10 mW of average output power.

  5. Optical properties of ZnSe(Te) with ytterbium impurity.

    PubMed

    Makhniy, Viktor P; Horley, Paul P; Vorobiev, Yuri V; Kinzerska, Oksana V

    2016-04-20

    We report the results on infrared transmission measurements of non-doped and tellurium-doped crystals of zinc selenide grown from the melt. It was found that non-doped samples feature high transmission (50%-60%) for the wavelengths of 1-22 μm. The efficient scintillating crystals of ZnSe(Te) are almost opaque for λ>7  μm. Doping these samples with ytterbium from the gas phase does not achieve any significant transmission increase for non-doped ZnSe samples in the spectral range of 1-22 μm. However, it considerably increases (up to 50%) transmission for doped ZnSe(Te) at the wavelengths λ>10  μm. These optical peculiarities were analyzed taking into account restructurization of point defect ensembles created by Te and Yb impurities. PMID:27140112

  6. Synthesis of Titanium Oxide Nanoparticles by Ytterbium Fiber Laser Ablation

    NASA Astrophysics Data System (ADS)

    Boutinguiza, M.; del Val, J.; Riveiro, A.; Lusquiños, F.; Quintero, F.; Comesaña, R.; Pou, J.

    Nanosized titanium particles have recently received a special attention due to their applications in many different fields, such as catalysis, biomedical engineering, etc. Pulsed laser ablation in liquid media allows obtaining metallic and metallic oxide nanoparticles in colloids. This technique has been used in the present work to prepare titanium colloids from a solid piece immersed in liquid media. A monomode Ytterbium doped fiber laser has been focused onto the upper surface of the titanium target in de-ionized water or ethanol. Crystalline phases, morphology and optical properties of the obtained colloidal nanoparticles were characterized by XRD, HRTEM, and UV/VIS absorption spectroscopy. The produced titanium oxide crystalline nanoparticles show spherical shape and are polycrystalline, exhibiting anatase as well as rutile phases.

  7. Diffuse phase transition of Fe doped lead ytterbium tantalate ceramics

    NASA Astrophysics Data System (ADS)

    Rout, Dibyaranjan; Subramanian, V.; Hariharan, K.; Sivasubramanian, V.

    2006-02-01

    The effect of different concentration of Fe on the phase transition behavior of Lead ytterbium tantalate is investigated by dielectric and differential scanning calrimetry measurements. The samples are prepared through solid state reaction method and it has been found that the sintering temperature significantly lowered when the proportion of Pb(Fe 1/2Ta 1/2)O 3 increased. It has been observed that the doping in small amounts (0≤ x≤0.2) of Fe could meliorate the dielectric and ferroelectric properties. The diffuseness in the mode of phase transition increases and the phase transition temperature decreases as a function of Fe content. It is revealed that the dielectric data and heat capacity data follow a similar trend in the variation of the mode of phase transition and phase transition temperatures. The phase transition temperature values obtained from the heat capacity measurement well agreed with the values obtained from dielectric measurement.

  8. High gain ytterbium doped Ge pedestal large pitch fiber

    NASA Astrophysics Data System (ADS)

    Gaida, Christian; Stutzki, Fabian; Jansen, Florian; Otto, Hans-Jürgen; Eidam, Tino; Jauregui, Cesar; Limpert, Jens; Tünnermann, Andreas

    2014-03-01

    Large mode area rod-type fibers have enabled amplification of ultra-short pulses to mJ pulse energy and MW peak powers. For very large mode field areas, fibers have to be designed as rigid rods with typical fiber lengths of around 1 m for efficient operation. A shorter fiber length can be desirable to reduce the packaging size of commercial systems and to decrease the impact of parasitic nonlinear effects for peakpower scaling. The fiber design presented here is based on a modified large-pitch fiber with an effectively higher ytterbium concentration in the fiber core. To achieve index matching the cladding index needs to be changed. In this contribution we propose to co-dope the passive host material with germanium to match both indices and to obtain a higher Yb-concentration within the active core. Compared to standard LPF, where the core index is reduced by co-doping the core with Flourine, the ytterbium doping concentration of this novel germanium-pedestal LPF is doubled. A detailed numerical and experimental investigation shows that with short fiber lengths <40cm is feasible to achieve output powers beyond 100W with 10W seed. Significantly higher gains, of nearly 30 dB, can be achieved for fiber lengths in the order of 60cm. A similar gain can be expected in a conventional LPF with 1.20 m length. In conclusion, we demonstrate a fiber design for significantly enhanced energy storage per fiber length and improved pump absorption. This concept will notably reduce the footprint of ultra-short fiber laser systems.

  9. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Revenues collected from power operations. 175.10 Section... POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from power... procedures in §§ 175.11 and 175.12 to generate power revenue. (a) Revenues. Revenues collected from...

  10. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in...

  11. 33 CFR 175.105 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.105 Definitions. (a) Visual distress signal means a device that is approved by the Commandant under 46 CFR Part 160 or certified by the manufacturer under 46 CFR Parts 160 and 161. (b) Coastal waters means: (1) The U.S. waters of the Great Lakes...

  12. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the...) Butyl acetate Butyl acetyl ricinoleate Butyl alcohol Butylated reaction product of p-cresol and...) graft polymer Carbon black, channel process Carbon disulfide-1,1′-methylenedipiperidine reaction...

  13. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the...) Butyl acetate Butyl acetyl ricinoleate Butyl alcohol Butylated reaction product of p-cresol and...) graft polymer Carbon black, channel process Carbon disulfide-1,1′-methylenedipiperidine reaction...

  14. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... alcohol Butylated reaction product of p-cresol and dicyclopentadiene As identified in § 178.2010(b) of... Carbon disulfide-1,1′-methylenedipiperidine reaction product Carbon tetrachloride...

  15. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide... of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies... entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization,...

  16. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide Debarment and Suspension... that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide Debarment and... defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization, including any nonprofit institution...

  17. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide... of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies... entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization,...

  18. 46 CFR 175.540 - Equivalents.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... lifesaving appliance or arrangement as an equivalent if it has performance characteristics at least... IMO Resolution A. 520(13) (incorporated by reference, see 46 CFR 175.600); or (2) Has successfully... Safety Management (ISM) Code (IMO Resolution A.741(18)) for the purpose of determining that an...

  19. 49 CFR 175.90 - Damaged shipments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... unit load device was stowed must be inspected for evidence of leakage or contamination immediately upon... for contamination and decontaminated, if applicable. (b) Except as provided in § 175.700, the operator... that a hazardous material may be the cause of the contamination, the operator must take...

  20. 49 CFR 175.90 - Damaged shipments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... unit load device was stowed must be inspected for evidence of leakage or contamination immediately upon... for contamination and decontaminated, if applicable. (b) Except as provided in § 175.700, the operator... that a hazardous material may be the cause of the contamination, the operator must take...

  1. Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

    NASA Technical Reports Server (NTRS)

    Good, Brian S.

    2015-01-01

    Silicon-based ceramic components for next-generation jet turbine engines offer potential weight savings, as well as higher operating temperatures, both of which lead to increased efficiency and lower fuel costs. Silicon carbide (SiC), in particular, offers low density, good strength at high temperatures, and good oxidation resistance in dry air. However, reaction of SiC with high-temperature water vapor, as found in the hot section of jet turbine engines in operation, can cause rapid surface recession, which limits the lifetime of such components. Environmental Barrier Coatings (EBCs) are therefore needed if long component lifetime is to be achieved. Rare earth silicates such as Yb2Si2O7 and Yb2SiO5 have been proposed for such applications; in an effort to better understand diffusion in such materials, we have performed kinetic Monte Carlo (kMC) simulations of oxygen diffusion in Ytterbium disilicate, Yb2- Si2O7. The diffusive process is assumed to take place via the thermally activated hopping of oxygen atoms among oxygen vacancy sites or among interstitial sites. Migration barrier energies are computed using density functional theory (DFT).

  2. Ytterbium-doped glass-ceramics for optical refrigeration.

    PubMed

    Filho, Elton Soares de Lima; Krishnaiah, Kummara Venkata; Ledemi, Yannick; Yu, Ye-Jin; Messaddeq, Younes; Nemova, Galina; Kashyap, Raman

    2015-02-23

    We report for the first time the characterization of glass-ceramics for optical refrigeration. Ytterbium-doped nanocrystallites were grown in an oxyfluoride glass matrix of composition 2YbF(3):30SiO(2)-15Al(2)O(3)-25CdF(2)-22PbF(2)-4YF(3), forming bulk glass-ceramics at three different crystalisation levels. The samples are compared with a corresponding uncrystalised (glass) sample, as well as a Yb:YAG sample which has presented optical cooling. The measured X-ray diffraction spectra, and thermal capacities of the samples are reported. We also report for the first time the use of Yb:YAG as a reference for absolute photometric quantum efficiency measurement, and use the same setup to characterize the glass and glass-ceramic samples. The cooling figure-of-merit was measured by optical calorimetry using a fiber Bragg grating and found to depend on the level of crystallization of the sample, and that samples with nanocrystallites result in higher quantum efficiency and lower background absorption than the pure-glass sample. In addition to laser-induced cooling, the glass-ceramics have the potential to serve as a reference for quantum efficiency measurements. PMID:25836500

  3. Atomic Parity Violation and Related Physics in Ytterbium

    NASA Astrophysics Data System (ADS)

    Dounas-Frazer, Dimitri Robert

    Atomic parity violation has been observed in the 408 nm 1 S0→3D1 forbidden transition of ytterbium. The parity violating amplitude is 8.7(1.4)e-10 ea0, two orders of magnitude larger than in cesium, where the most precise experiments to date have been performed. This is in accordance with theoretical predictions and constitutes the largest atomic parity violating amplitude yet observed. This also opens the way to future measurements of neutron skins and anapole moments by comparing parity-violating amplitudes for various isotopes and hyperfine components of the transition. We present a detailed description of the observation. Linearly polarized 408 nm light interacts with ytterbium atoms in crossed electric (E) and magnetic fields (B). The probability of the 1 S0→3D1 transition contains a parity-violating term, proportional to E'B[( E'xE B], arising from interference between the amplitudes of transitions induced by the electroweak interaction and the Stark effect ((E' is the optical electric field). The transition probability is detected by measuring the population of the metastable 3P0 state, to which 65% of the atoms excited to the 3D1 state spontaneously decay. The population of the 3P0 state is determined by resonantly exciting the atoms with 649 nm light to the 3S1 state and collecting the fluorescence resulting from its decay. Systematic corrections due to imperfections in the applied electric and magnetic fields are determined in auxiliary experiments. The statistical uncertainty is dominated by parasitic frequency excursions of the 408-nm excitation light due to imperfect stabilization of the optical reference with respect to the atomic resonance. The present uncertainties are 9% statistical and 8% systematic. Methods of improving the accuracy for the future experiments are discussed. We further present a measurement of the dynamic scalar and tensor polarizabilities of ytterbium's 3D1 state. The polarizabilities were measured by analyzing the spectral

  4. Parity violation in atomic ytterbium: Experimental sensitivity and systematics

    SciTech Connect

    Tsigutkin, K.; Dounas-Frazer, D.; Family, A.; Stalnaker, J. E.; Yashchuk, V. V.; Budker, D.

    2010-03-15

    We present a detailed description of the observation of parity violation in the {sup 1}S{sub 0}-{sup 3}D{sub 1} 408-nm forbidden transition of ytterbium, a brief report of which appeared earlier. Linearly polarized 408-nm light interacts with Yb atoms in crossed E and B fields. The probability of the 408-nm transition contains a parity-violating term, proportional to ({center_dot}B)[(Ex){center_dot}B], arising from interference between the parity-violating amplitude and the Stark amplitude due to the E field ( is the electric field of the light). The transition probability is detected by measuring the population of the {sup 3}P{sub 0} state, to which 65% of the atoms excited to the {sup 3}D{sub 1} state spontaneously decay. The population of the {sup 3}P{sub 0} state is determined by resonantly exciting the atoms with 649-nm light to the 6s7s {sup 3}S{sub 1} state and collecting the fluorescence resulting from its decay. Systematic corrections due to E-field and B-field imperfections are determined in auxiliary experiments. The statistical uncertainty is dominated by parasitic frequency excursions of the 408-nm excitation light due to the imperfect stabilization of the optical reference with respect to the atomic resonance. The present uncertainties are 9% statistical and 8% systematic. Methods of improving the accuracy for future experiments are discussed.

  5. Multidimensional Purcell effect in an ytterbium-doped ring resonator

    NASA Astrophysics Data System (ADS)

    Ding, Dapeng; Pereira, Lino M. C.; Bauters, Jared F.; Heck, Martijn J. R.; Welker, Gesa; Vantomme, André; Bowers, John E.; de Dood, Michiel J. A.; Bouwmeester, Dirk

    2016-06-01

    Rare-earth ions in solids are of particular interest for quantum information storage and processing because of the long coherence times of the 4f states. In the past few years, substantial progress has been made by using ensembles of ions and single ions. However, the weak optical transitions within the 4f manifold pose a great challenge to the optical interaction with a single rare-earth ion on a single-photon level. Here, we demonstrate a ninefold enhanced ion–light interaction (Purcell effect) in an integrated-optics-based, fibre-coupled silicon nitride (Si3N4) ring resonator with implanted ytterbium ions (Yb3+). We unveil the one-, two- and three-dimensional contributions to the Purcell factor as well as the temperature-dependent decoherence and depolarization of the ions. The results indicate that this cavity quantum electrodynamics (QED) system has the potential of interfacing single rare-earth ions with single photons on a chip.

  6. Contamination of YBCO bulk superconductors by samarium and ytterbium

    NASA Astrophysics Data System (ADS)

    Volochova, D.; Jurek, K.; Radusovska, M.; Piovarci, S.; Antal, V.; Kovac, J.; Jirsa, M.; Diko, P.

    2014-01-01

    Y-Ba-Cu-O (YBCO, Y-123) single-grain bulk superconductors with a nominal composition Y1.5Ba2Cu3Ox and 1 wt% CeO2 addition were prepared by the optimized Top-Seeded Melt-Growth process. Small single-crystalline pieces cut from the SmBa2Cu3Oy (Sm-123) bulk were used for seeding of epitaxial growth. Wavelength-dispersive spectrometry (WDS) confirmed that prepared samples contain besides samarium from the seed also ytterbium from the substrate. The influence of maximum melting temperature, Tmax and dwell time on the contamination of the bulk samples was studied. Y2BaCuO5 (Y-211) barriers against samarium diffusion from the seed to melted sample were tested. Using a NdBa2Cu3Oz (Nd-123) seed and a combination of Y2O3 and Yb2O3 substrate led to a high critical temperature (Tc(50%) = 91.54 K) of prepared sample.

  7. High-power output of ytterbium-doped oxyorthosilicate lasers at 1018 nm

    NASA Astrophysics Data System (ADS)

    Lin, Niannian; Li, Wenxue; Zhou, Yuan; Shi, Yi; Yan, Ming; Yang, Kangwen; Zhao, Jian; Yang, Xianghui; Zeng, Heping

    2013-01-01

    A high-power laser system at 1018 nm was realized with an ytterbium-doped oxyorthosilicate solid-state master oscillator and ytterbium-doped double-clad fiber amplifier. In the Yb:LSO (Yb:Lu2SiO5) and Yb:LYSO (Yb:LuYSiO5) master laser oscillator, we attained the broadest tunable wavelength range from 994.50 to 1094.22 nm. In the power amplifier, we achieved an output power up to 4.14 W at 1018 nm by amplifying the Yb:LSO laser under a pump power of 15.8 W.

  8. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 5 2014-01-01 2014-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  9. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 5 2012-01-01 2012-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  10. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 4 2011-01-01 2011-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  11. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 5 2013-01-01 2013-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  12. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  13. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Percentage limitation and carryover. 1.175-5 Section 1.175-5 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-5 Percentage limitation...

  14. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Pressure-sensitive adhesives. 175.125 Section 175... Adhesives § 175.125 Pressure-sensitive adhesives. Pressure-sensitive adhesives may be safely used as the... prescribed conditions: (a) Pressure-sensitive adhesives prepared from one or a mixture of two or more of...

  15. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Pressure-sensitive adhesives. 175.125 Section 175... Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives. Pressure-sensitive... accordance with the following prescribed conditions: (a) Pressure-sensitive adhesives prepared from one or...

  16. 7 CFR 400.175 - Revocation and non-acceptance.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 6 2011-01-01 2011-01-01 false Revocation and non-acceptance. 400.175 Section 400.175 Agriculture Regulations of the Department of Agriculture (Continued) FEDERAL CROP INSURANCE CORPORATION...; Regulations for the 1997 and Subsequent Reinsurance Years § 400.175 Revocation and non-acceptance. (a)...

  17. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  18. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  19. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  20. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from power operations. The Area Director shall set...

  1. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  2. 25 CFR 175.11 - Procedures for setting service fees.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Procedures for setting service fees. 175.11 Section 175... UTILITIES Service Fees, Electric Power Rates and Revenues § 175.11 Procedures for setting service fees. The... service. Service fees shall be set by unilateral action of the Area Director and remain in effect...

  3. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 1 2014-10-01 2014-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare Department of Health and Human Services GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  4. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 1 2012-10-01 2012-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  5. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 1 2013-10-01 2013-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  6. 46 CFR 175.115 - Applicability to offshore supply vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Applicability to offshore supply vessels. 175.115 Section 175.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.115 Applicability to offshore supply vessels....

  7. 25 CFR 175.4 - Authority of area director.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Authority of area director. 175.4 Section 175.4 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.4 Authority of area director. The Area Director may delegate authority under...

  8. 25 CFR 175.4 - Authority of area director.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Authority of area director. 175.4 Section 175.4 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.4 Authority of area director. The Area Director may delegate authority under...

  9. 25 CFR 175.4 - Authority of area director.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Authority of area director. 175.4 Section 175.4 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.4 Authority of area director. The Area Director may delegate authority under...

  10. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 11 2014-01-01 2014-01-01 false General plant materials. 1726.175 Section 1726.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General...

  11. 37 CFR 1.75 - Claim(s).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Claim(s). 1.75 Section 1.75... GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a.... (35 U.S.C. 6; 15 U.S.C. 1113, 1126)...

  12. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  13. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  14. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  15. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  16. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 1 2013-07-01 2013-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5 Eligibility...

  17. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 1 2012-07-01 2012-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5 Eligibility...

  18. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 1 2014-07-01 2014-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5 Eligibility...

  19. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 1 2011-07-01 2011-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5 Eligibility...

  20. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  1. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  2. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  3. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  4. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 9 2014-07-01 2014-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  5. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 9 2013-07-01 2013-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  6. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 9 2012-07-01 2012-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  7. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 2 2012-04-01 2012-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  8. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 2 2013-04-01 2013-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  9. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 2 2014-04-01 2014-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  10. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 2 2011-04-01 2011-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  11. 46 CFR 175.600 - Incorporation by reference.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Incorporation by reference. 175.600 Section 175.600 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.600 Incorporation by reference. (a) Certain material is incorporated by reference into this subchapter with...

  12. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 11 2013-01-01 2013-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  13. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 11 2010-01-01 2010-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  14. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 11 2012-01-01 2012-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  15. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 11 2011-01-01 2011-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  16. 46 CFR 175.120 - Vessels on an international voyage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Vessels on an international voyage. 175.120 Section 175... 100 GROSS TONS) GENERAL PROVISIONS § 175.120 Vessels on an international voyage. A mechanically propelled vessel that carries more than 12 passengers on an international voyage must comply with...

  17. 46 CFR 175.120 - Vessels on an international voyage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Vessels on an international voyage. 175.120 Section 175... 100 GROSS TONS) GENERAL PROVISIONS § 175.120 Vessels on an international voyage. A mechanically propelled vessel that carries more than 12 passengers on an international voyage must comply with...

  18. 46 CFR 175.120 - Vessels on an international voyage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Vessels on an international voyage. 175.120 Section 175... 100 GROSS TONS) GENERAL PROVISIONS § 175.120 Vessels on an international voyage. A mechanically propelled vessel that carries more than 12 passengers on an international voyage must comply with...

  19. 46 CFR 175.120 - Vessels on an international voyage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Vessels on an international voyage. 175.120 Section 175... 100 GROSS TONS) GENERAL PROVISIONS § 175.120 Vessels on an international voyage. A mechanically propelled vessel that carries more than 12 passengers on an international voyage must comply with...

  20. 46 CFR 175.120 - Vessels on an international voyage.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Vessels on an international voyage. 175.120 Section 175... 100 GROSS TONS) GENERAL PROVISIONS § 175.120 Vessels on an international voyage. A mechanically propelled vessel that carries more than 12 passengers on an international voyage must comply with...

  1. 37 CFR 1.75 - Claim(s).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Claim(s). 1.75 Section 1.75... GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a... not serve as a basis for any other multiple dependent claim. For fee calculation purposes under §...

  2. 37 CFR 1.75 - Claim(s).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2011-07-01 2011-07-01 false Claim(s). 1.75 Section 1.75... GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a... not serve as a basis for any other multiple dependent claim. For fee calculation purposes under §...

  3. 37 CFR 1.75 - Claim(s).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2014-07-01 2014-07-01 false Claim(s). 1.75 Section 1.75... GENERAL RULES OF PRACTICE IN PATENT CASES National Processing Provisions Specification § 1.75 Claim(s). (a... not serve as a basis for any other multiple dependent claim. For fee calculation purposes under §...

  4. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 10 Energy 2 2014-01-01 2014-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  5. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 2 2013-01-01 2013-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  6. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  7. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 10 Energy 2 2012-01-01 2012-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  8. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 2 2011-01-01 2011-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  9. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  10. 25 CFR 175.60 - Appeals to the area director.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Appeals to the area director. 175.60 Section 175.60... UTILITIES Appeals § 175.60 Appeals to the area director. (a) Any person adversely affected by a decision made under this part by a person under the authority of an Area Director may file a notice of...

  11. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  12. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 1 2011-10-01 2011-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  13. 21 CFR 161.175 - Frozen raw breaded shrimp.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 2 2014-04-01 2014-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one... food tests not less than 50 percent of shrimp material as determined by the method prescribed...

  14. 21 CFR 161.175 - Frozen raw breaded shrimp.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 2 2011-04-01 2011-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one... food tests not less than 50 percent of shrimp material as determined by the method prescribed...

  15. 21 CFR 161.175 - Frozen raw breaded shrimp.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 2 2013-04-01 2013-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one... food tests not less than 50 percent of shrimp material as determined by the method prescribed...

  16. 21 CFR 161.175 - Frozen raw breaded shrimp.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 2 2012-04-01 2012-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one... food tests not less than 50 percent of shrimp material as determined by the method prescribed...

  17. 21 CFR 161.175 - Frozen raw breaded shrimp.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Frozen raw breaded shrimp. 161.175 Section 161.175... § 161.175 Frozen raw breaded shrimp. (a) Frozen raw breaded shrimp is the food prepared by coating one... food tests not less than 50 percent of shrimp material as determined by the method prescribed...

  18. 46 CFR 172.175 - Character of damage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Character of damage. 172.175 Section 172.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... Under Subchapter O of This Chapter § 172.175 Character of damage. (a) If a type IG hull is...

  19. 46 CFR 172.175 - Character of damage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Character of damage. 172.175 Section 172.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES... Under Subchapter O of This Chapter § 172.175 Character of damage. (a) If a type IG hull is...

  20. 14 CFR 25.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... stability. 25.175 Section 25.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows:...

  1. 14 CFR 25.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... stability. 25.175 Section 25.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows:...

  2. 14 CFR 23.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... stability. 23.175 Section 23.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows: (a) Climb. The stick force curve must have a stable slope at speeds...

  3. 14 CFR 25.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... stability. 25.175 Section 25.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Flight Stability § 25.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows:...

  4. 14 CFR 23.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... stability. 23.175 Section 23.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows: (a) Climb. The stick force curve must have a stable slope at speeds...

  5. 14 CFR 23.175 - Demonstration of static longitudinal stability.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... stability. 23.175 Section 23.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... Flight Stability § 23.175 Demonstration of static longitudinal stability. Static longitudinal stability must be shown as follows: (a) Climb. The stick force curve must have a stable slope at speeds...

  6. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 13 Business Credit and Assistance 1 2012-01-01 2012-01-01 false Coastal barrier islands. 120.175 Section 120.175 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION BUSINESS LOANS Policies Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not...

  7. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 13 Business Credit and Assistance 1 2011-01-01 2011-01-01 false Coastal barrier islands. 120.175 Section 120.175 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION BUSINESS LOANS Policies Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not...

  8. 25 CFR 175.21 - Discontinuance of service.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Discontinuance of service. 175.21 Section 175.21 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.21 Discontinuance of service. Failure of customer(s) to comply...

  9. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  10. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the food... statement of ingredients, prescribed for pasteurized process cheese spread by § 133.179, except that...

  11. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Pressure-sensitive adhesives. 175.125 Section 175...) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives....

  12. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Requirements for receiving electrical service. 175.22 Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical service. In addition to the other requirements...

  13. 40 CFR 98.175 - Procedures for estimating missing data.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 21 2014-07-01 2014-07-01 false Procedures for estimating missing data. 98.175 Section 98.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Iron and Steel Production § 98.175 Procedures...

  14. 40 CFR 98.175 - Procedures for estimating missing data.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 22 2013-07-01 2013-07-01 false Procedures for estimating missing data. 98.175 Section 98.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Iron and Steel Production § 98.175 Procedures...

  15. 25 CFR 175.31 - Methods and terms of payment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Methods and terms of payment. 175.31 Section 175.31... UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be made... refuse, for cause, to accept personal checks for payment of bills....

  16. 20 CFR 401.175 - Government Accountability Office.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Government Accountability Office. 401.175 Section 401.175 Employees' Benefits SOCIAL SECURITY ADMINISTRATION PRIVACY AND DISCLOSURE OF OFFICIAL RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government...

  17. 40 CFR 180.175 - Maleic hydrazide; tolerances for residues.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... residues. 180.175 Section 180.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... § 180.175 Maleic hydrazide; tolerances for residues. (a) General. (1) Tolerances for residues of the... exceed 160 parts per million by weight of the finished food. (b) Section 18 emergency exemptions....

  18. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Personal flotation devices... SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15 Personal flotation devices required. Except as provided in § 175.17 and 175.25: (a) No person may use a...

  19. 46 CFR 175.900 - OMB control numbers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... information collection requirement. (b) Display. 46 CFR Section where identified Current OMB Control Number... 46 Shipping 7 2014-10-01 2014-10-01 false OMB control numbers. 175.900 Section 175.900 Shipping...) GENERAL PROVISIONS § 175.900 OMB control numbers. (a) Purpose. This section lists the control...

  20. SOLITONS AND OPTICAL FIBERS: Self-Q-switched ytterbium-doped cladding-pumped fibre laser

    NASA Astrophysics Data System (ADS)

    Grukh, Dmitrii A.; Kurkov, Andrei S.; Razdobreev, I. M.; Fotiadi, A. A.

    2002-11-01

    A self-Q-switched ytterbium-doped double-clad fibre laser is described. A samarium-doped fibre is used as a filter for protecting a pump source. A fibre coupler is employed to obtain a nonlinear feedback. The mechanism of pulse formation in the laser is considered, and the dependence of its output pulse on the coupler parameters is studied.

  1. Novel highly emissive tetracyanotetraphenylporphyrazine ytterbium complex for optoelectronic and biophotonic applications

    NASA Astrophysics Data System (ADS)

    Klapshina, Larisa G.; Douglas, William E.; Grigoryev, Ilya S.; Shirmanova, Marina V.; Gerbier, Philippe; Bushuk, Boris A.

    2010-02-01

    The preparation is described of a novel highly emissive ytterbium complex with a proposed unusual structure obtained by reaction of tricyanovinylbenzene (TCNVB) with bis(indenyl)ytterbium(II) in THF. The reaction occurs under extremely mild conditions, the tetraphenyltetracyanoporphyrazine macrocycle being assembled in high yield from TCNVB building-blocks by Yb3+-template synthesis. The analytical, spectral and electrochemical investigations of the obtained ytterbium complex indicate its existence in the form of a binuclear adduct with Yb(TCNVB)3 species in which a one doubly reduced TCNVB molecule bridges two Yb3+ cations. The formation of a disordered polynuclear coordination polymer network including a macrocyclic structure and metal cations bridged through the nitrile nitrogen atoms is proposed. The complex is readily soluble and is compatible with a variety of polymeric matrices giving doped polymeric glasses and films which are highly luminescent in the biologically relevant optical window covering the visible and near infrared range (640-1000 nm). In addition, doped polymeric glasses and films highly emissive at the telecommunication wavelength (1540 nm) including the novel ytterbium complex and originally not luminescent erbium chelate in an equimolar ratio have been obtained. The compound is found to be an extraordinarily strong sensitizer of near-IR Er3+ emission. Use of the Yb complex as a fluorescent marker for biomedical in vitro investigations has been demonstrated.

  2. Residual stresses and phase transformations in Ytterbium silicate environmental barrier coatings

    NASA Astrophysics Data System (ADS)

    Stolzenburg, Fabian

    Due to their high melting temperature, low density, and good thermomechanical stability, silicon-based ceramics (SiC, Si3N4) are some of the most promising materials systems for high temperature structural applications in gas turbine engines. However, their silica surface layer reacts with water vapor contained in combustion environments. The resulting hydroxide layer volatilizes, leading to component recession. Environmental barrier coatings (EBCs) have been developed to shield the substrate from degradation. Next generation coatings for silicon-based ceramics based on ytterbium silicates have shown a promising combination of very low and good thermomechanical properties. The focus of this thesis is threefold: In the first part, phase transformations in plasma sprayed ytterbium silicates were investigated. Plasma sprayed materials are known to contain large amounts of amorphous material. Phase changes during the conversion from amorphous to crystalline materials were investigated as they have been known to lead to failure in many coatings. The second part of this work focused on measuring residual stresses in multilayer EBCs using synchrotron X-ray diffraction (XRD). Strains were resolved spatially, with probe sizes as small as 20 um. Stresses were calculated using mechanical properties of ytterbium silicates, determined with in-situ loading and heating experiments. In-situ and ex-situ heating experiments allowed for the study of changes in stress states that occur in these EBC materials during heating and cooling cycles. Lastly, the interaction of ytterbium silicates with low-melting environmental calcium-magnesium-aluminosilicate (CMAS) glasses was studied. Synchrotron XRD was used to study the influence of CMAS on the stress state in the coating, X-ray computed tomography was used to provide 3D images of coatings, and EDS and TEM analysis were used to study the interactions at the CMAS/ytterbium silicate interface in detail.

  3. Highly efficient cladding-pumped fibre laser based on an ytterbium-doped optical fibre and a fibre Bragg grating

    SciTech Connect

    Kurkov, Andrei S; Karpov, V I; Medvedkov, O I; Dianov, Evgenii M; Vasil'ev, Sergei A; Paramonov, Vladimir M; Protopopov, V N; Laptev, A Yu; Gur'yanov, A N; Umnikov, A A; Vechkanov, N I; Artyushenko, V G; Frahm, J

    1999-06-30

    Ytterbium-ion-doped double-clad optical fibres were developed. The differential quantum efficiency of a diode-pumped fibre laser, fabricated on the basis of such optical fibres with a fibre Bragg grating, was 90%. (lasers)

  4. Preparation of a Ytterbium-tagged Gunshot Residue Standard for Quality Control in the Forensic Analysis of GSR.

    PubMed

    Hearns, Nigel G R; Laflèche, Denis N; Sandercock, Mark L

    2015-05-01

    Preparation of a ytterbium-tagged gunshot residue (GSR) reference standard for scanning electron microscopy and energy dispersive X-ray spectroscopic (SEM-EDS) microanalysis is reported. Two different chemical markers, ytterbium and neodymium, were evaluated by spiking the primers of 38 Special ammunition cartridges (no propellant, no projectile) and discharging them onto 12.7 mm diameter aluminum SEM pin stubs. Following SEM-EDS microanalysis, the majority of tri-component particles containing lead, barium, and antimony (PbBaSb) were successfully tagged with the chemical marker. Results demonstrate a primer spiked with 0.75% weight percent of ytterbium nitrate affords PbBaSb particles characteristic of GSR with a ytterbium inclusion efficiency of between 77% and 100%. Reproducibility of the method was verified, and durability of the ytterbium-tagged tri-component particles under repeated SEM-EDS analysis was also tested. The ytterbium-tagged PbBaSb particles impart synthetic traceability to a GSR reference standard and are suitable for analysis alongside case work samples, as a positive control for quality assurance purposes. PMID:25678346

  5. 40 CFR 415.175 - New source performance standards (NSPS).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... GUIDELINES AND STANDARDS INORGANIC CHEMICALS MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory § 415.175 New source performance standards (NSPS). Any new source...

  6. Hybrid Ytterbium-doped large-mode-area photonic crystal fiber amplifier for long wavelengths.

    PubMed

    Petersen, Sidsel R; Alkeskjold, Thomas T; Poli, Federica; Coscelli, Enrico; Jørgensen, Mette M; Laurila, Marko; Lægsgaard, Jesper; Broeng, Jes

    2012-03-12

    A large-mode-area Ytterbium-doped photonic crystal fiber amplifier with build-in gain shaping is presented. The fiber cladding consists of a hexagonal lattice of air holes, where three rows are replaced with circular high-index inclusions. Seven missing air holes define the large-mode-area core. Light confinement is achieved by combined index and bandgap guiding, which allows for single-mode operation and gain shaping through distributed spectral filtering of amplified spontaneous emission. The fiber properties are ideal for amplification in the long wavelength regime of the Ytterbium gain spectrum above 1100 nm, and red shifting of the maximum gain to 1130 nm is demonstrated. PMID:22418478

  7. Stress Measurements in Shock-Loaded PBX 9501 with Embedded Longitudinal and Lateral Piezoresistive Ytterbium Gauges

    SciTech Connect

    D.E. Hooks

    2004-12-15

    A series of light gas gun impact experiments were performed with piezoresistive ytterbium (Yb) gauges in longitudinal and lateral orientations embedded in the plastic bonded explosive PBX 9501. These experiments were performed to evaluate the feasibility of using this method to measure lateral stresses and shear strength dynamically in PBX 9501. Ytterbium was chosen as a gauge material based on its high piezoresistance changes at low stress levels. Experiments were performed at longitudinal impact stresses of approximately 0.6 GPa, which is above the yield point of Yb, near the dynamic yield point of PBX 9501, at a level that is comparable with other impact data, and relevant to several multidimensional safety tests. Results show that PBX 9501 does maintain strength throughout compression. Because of poor reproducibility observed in the experiments presented, it appears unlikely that stress extraction from these gauge results would yield an estimate of shear strength at this impact stress with acceptable error.

  8. Role of oxygen hole centres in the photodarkening of ytterbium-doped phosphosilicate fibre

    SciTech Connect

    Rybaltovsky, A A; Bobkov, K K; Likhachev, M E; Bubnov, M M; Dianov, E M; Umnikov, A A; Lipatov, D S; Gur'yanov, A N; Romanov, A N; Sulimov, V B

    2013-11-30

    We have studied the photodarkening in active fibres with an ytterbium-doped phosphosilicate glass core under IR irradiation with a pump source (920 nm) and UV irradiation (193 nm). Analysis of absorption and luminescence spectra suggests that such irradiations produce phosphorus – oxygen – hole centres (P-OHCs) in the core glass network and lead to the reduction of the ytterbium ions to a divalent state (Yb{sup 2+}). The photoinduced optical loss in the fibres in the visible range (400 – 700 nm) is mainly due to absorption by the P-OHCs. A quantum-mechanical model is proposed for P-OHC and Yb{sup 2+} formation. (nonlinear optical phenomena)

  9. Soliton transmission and supercontinuum generation in holey fiber, using a diode pumped Ytterbium fiber source.

    PubMed

    Price, Jonathan; Belardi, W; Monro, T; Malinowski, A; Piper, A; Richardson, D

    2002-04-22

    We report linear dispersion compensation, soliton pulse formation, soliton compression, and ultra-broad supercontinuum generation in a holey fiber with anomalous dispersion at wavelengths above 800nm. The holey fiber was seeded with ultrashort pulses from a diode pumped, Ytterbium (Yb)-doped fiber source operating at 1.06 microm. The results highlight the compatibility of the rapidly developing holey fiber technology with short pulse Yb-doped fiber lasers for wide application. PMID:19436371

  10. Diode-pumped ytterbium-doped phosphate and tungstate regenerative amplifiers and ancillary investigations

    NASA Astrophysics Data System (ADS)

    Liu, Hsiao-Hua

    This thesis focuses on the development of directly diode- pumped solid-state regenerative laser amplifiers. Our purpose is to build a compact, simple, reliable, and economical subpicosecond laser system by employing a direct diode-pumping scheme for real-world applications such as medical surgeries and micromachining. Ytterbium- doped phosphate glass (QX/Yb) and ytterbium-doped tungstate crystals (Yb:KYW and Yb:KGW) are used as the amplifier gain media, and their laser properties are discussed and compared with other ytterbium-doped materials. The same oscillator, stretcher, and compressor are used with each amplifier presented. Both end- and side-pumping configurations are implemented and compared wherever possible. Typically, an end-pumped laser has a higher efficiency, whereas a side-pumped laser has a simpler, and thus more compact setup. To improve the efficiency of a side-pumped laser, we have proposed and demonstrated a novel pumping scheme with the QX/Yb, amplifier. To match the elliptical beam from the pump diodes, we have designed and built cavities with an elliptical fundamental mode by using cylindrical optics. Millijoule, subpicosecond pulses have been produced from our QX/Yb regenerative amplifier using the proposed pumping scheme and an elliptic-mode cavity. The diode- pumped ytterbium-doped tungstate regenerative amplifiers in this thesis produced subpicosecond pulses with at least tens of microjoules of pulse energy at a kHz repetition rate, also using a cavity with an elliptical fundamental mode. A self-starting Kerr-lens mode-locked Yb:KYW oscillator directly pumped by diodes and a low- repetition-rate Yb:KGW regenerative amplifier pumped by a flashlamp-pumped Ti:sapphire laser are also presented as ancillary studies.

  11. Experimental Performance of a Single-Mode Ytterbium-doped Fiber Ring Laser with Intracavity Modulator

    NASA Technical Reports Server (NTRS)

    Numata, Kenji; Camp, Jordan

    2012-01-01

    We have developed a linearly polarized Ytterbium-doped fiber ring laser with a single longitudinal mode output at 1064 run. A fiber-coupled intracavity phase modulator ensured mode-hop free operation and allowed fast frequency tuning. The fiber laser was locked with high stability to an iodine-stabilized laser, showing a frequency noise suppression of a factor approx 10 (exp 5) at 1 mHz

  12. A new approach to controlling the ytterbium fibre laser output power

    SciTech Connect

    Voronin, V G; Nanii, Oleg E; Sus'yan, A A; Khlystov, V I

    2010-02-28

    A new approach has been proposed for controlling the linearly polarised output of an ytterbium-doped double-clad fibre laser: inverted-population modulation via loss modulation in a competing channel. The steady-state output power of the working channel has been determined as a function of loss in the competing channel. The results are qualitatively interpreted in terms of standard models of a dual-channel laser.

  13. Henry's Law vaporization studies and thermodynamics of einsteinium-253 metal dissolved in ytterbium

    SciTech Connect

    Kleinschmidt, P.D.; Ward, J.W.; Matlack, G.M.; Haire, R.G.

    1984-07-01

    The cohesive energy of metallic einsteinium determines whether einsteinium is a trivalent or divalent metal. The enthalpy of sublimation, a measure of the cohesive energy, is calculated from the partial pressures of einsteinium over an alloy. The partial pressure of /sup 253/Es has been measured over the range 470--870 K, using combined target and mass spectrometric Knudsen effusion techniques. An alloy was prepared with einsteinium dissolved in a ytterbium solvent to produce a very dilute solution. Partial pressure measurements on the alloy were amenable to the experimental technique and a data analysis using a Henry's law treatment of the data. Vapor pressure data are combined with an estimated crystal entropy S/sup 0//sub 298/ and ..delta..C/sup 0//sub p/ for ytterbium, to produce enthalpy, entropy, and free energy functions from 298 to 1300 K. The vapor pressure of einsteinium in a dilute einsteinium--ytterbium alloy is described by the equation log P(atm) = -(6815 +- 216)/T+2.576 +- 0.337, from which we calculate for the enthalpy of sublimation of pure einsteinium ..delta..H/sup 0//sub 298/ (second law) = 31.76 kcal/mol. The value of the enthalpy of sublimation is consistent with the conclusion that Es is a divalent metal.

  14. Studies on output characteristics of stable dual-wavelength ytterbium-doped photonic crystal fiber laser

    NASA Astrophysics Data System (ADS)

    Tian, Hongchun; Zhang, Sa; Hou, Zhiyun; Xia, Changming; Zhou, Guiyao; Zhang, Wei; Liu, Jiantao; Wu, Jiale; Fu, Jian

    2016-06-01

    A stable dual-wavelength ytterbium-doped photonic crystal fiber laser pumped by a 976 nm laser diode has been demonstrated at room temperature. Single-wavelength, dual-wavelength laser oscillations are observed when the fiber laser operates under different pump power by using different length of fibers. Stable dual-wavelength radiation around 1045 nm and 1075 nm has been generated simultaneously at a high pump power directly from an ytterbium-doped fiber laser without using any spectral control mechanism. A small core ytterbium-doped PCF fabricated by the powder sinter direction drawn rod technology is used as gain medium. The pump power and fiber length which can affect the output characteristics of dual-wavelength fiber laser are analyzed in the experiment. Experiments confirm that higher pump power and longer fiber length favors 1075 nm output; lower pump power and shorter fiber length favors 1045 nm output. Those results have a good reference in multi-wavelength fiber laser.

  15. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL...) of the Agricultural Marketing Act (12 U.S.C. 114j(a)) with not more than 500 employees; and (5)...

  16. 34 CFR 668.175 - Alternative standards and requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 34 Education 3 2013-07-01 2013-07-01 false Alternative standards and requirements. 668.175 Section 668.175 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF POSTSECONDARY EDUCATION, DEPARTMENT OF EDUCATION STUDENT ASSISTANCE GENERAL PROVISIONS Financial...

  17. 34 CFR 668.175 - Alternative standards and requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 34 Education 3 2012-07-01 2012-07-01 false Alternative standards and requirements. 668.175 Section 668.175 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF POSTSECONDARY EDUCATION, DEPARTMENT OF EDUCATION STUDENT ASSISTANCE GENERAL PROVISIONS Financial...

  18. 34 CFR 668.175 - Alternative standards and requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 34 Education 3 2014-07-01 2014-07-01 false Alternative standards and requirements. 668.175 Section 668.175 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF POSTSECONDARY EDUCATION, DEPARTMENT OF EDUCATION STUDENT ASSISTANCE GENERAL PROVISIONS Financial...

  19. 34 CFR 668.175 - Alternative standards and requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 34 Education 3 2011-07-01 2011-07-01 false Alternative standards and requirements. 668.175 Section 668.175 Education Regulations of the Offices of the Department of Education (Continued) OFFICE OF POSTSECONDARY EDUCATION, DEPARTMENT OF EDUCATION STUDENT ASSISTANCE GENERAL PROVISIONS Financial...

  20. 49 CFR 175.20 - Compliance and training.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... applicable hazardous materials training requirements in 14 CFR Part 121 and 135. ... 49 Transportation 2 2011-10-01 2011-10-01 false Compliance and training. 175.20 Section 175.20 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS...

  1. 49 CFR 175.20 - Compliance and training.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... applicable hazardous materials training requirements in 14 CFR Part 121 and 135. ... 49 Transportation 2 2010-10-01 2010-10-01 false Compliance and training. 175.20 Section 175.20 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS...

  2. 49 CFR 175.20 - Compliance and training.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... applicable hazardous materials training requirements in 14 CFR Part 121 and 135. ... 49 Transportation 2 2013-10-01 2013-10-01 false Compliance and training. 175.20 Section 175.20 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS...

  3. 21 CFR 175.210 - Acrylate ester copolymer coating.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Acrylate ester copolymer coating. 175.210 Section... COATINGS Substances for Use as Components of Coatings § 175.210 Acrylate ester copolymer coating. Acrylate ester copolymer coating may safely be used as a food-contact surface of articles intended for...

  4. 50 CFR 622.173-622.175 - [Reserved

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 50 Wildlife and Fisheries 12 2013-10-01 2013-10-01 false 622.173-622.175 Section 622.173-622.175 Wildlife and Fisheries FISHERY CONSERVATION AND MANAGEMENT, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE FISHERIES OF THE CARIBBEAN, GULF OF MEXICO, AND SOUTH ATLANTIC Snapper-Grouper...

  5. 14 CFR 91.175 - Takeoff and landing under IFR.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... III approach is determined by the appropriate 14 CFR part 97 approach procedure, letter of... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Takeoff and landing under IFR. 91.175 Section 91.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF...

  6. 27 CFR 53.175 - Readjustment for local advertising charges.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Readjustment for local advertising charges. 53.175 Section 53.175 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY (CONTINUED) FIREARMS MANUFACTURERS EXCISE TAXES-FIREARMS...

  7. 40 CFR 152.175 - Pesticides classified for restricted use.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 25 2013-07-01 2013-07-01 false Pesticides classified for restricted use. 152.175 Section 152.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... avian species. Microencapsulated ......do ......do Residue effects on avian species. Hazard to bees....

  8. 40 CFR 152.175 - Pesticides classified for restricted use.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 25 2012-07-01 2012-07-01 false Pesticides classified for restricted use. 152.175 Section 152.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... avian species. Microencapsulated ......do ......do Residue effects on avian species. Hazard to bees....

  9. 40 CFR 152.175 - Pesticides classified for restricted use.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Pesticides classified for restricted use. 152.175 Section 152.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... avian species. Microencapsulated ......do ......do Residue effects on avian species. Hazard to bees....

  10. 24 CFR 700.175 - Other Federal requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 4 2010-04-01 2010-04-01 false Other Federal requirements. 700.175 Section 700.175 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued) OFFICE OF THE SECRETARY, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING...

  11. 7 CFR 97.175 - Fees and charges.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Fees and charges. 97.175 Section 97.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) COMMODITY LABORATORY TESTING PROGRAMS PLANT VARIETY AND PROTECTION Fees...

  12. 40 CFR 141.175 - Reporting and recordkeeping requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 24 2013-07-01 2013-07-01 false Reporting and recordkeeping requirements. 141.175 Section 141.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Enhanced Filtration and Disinfection-Systems Serving 10,000 or More People...

  13. 7 CFR 1789.168-1789.175 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 12 2011-01-01 2011-01-01 false 1789.168-1789.175 Section 1789.168-1789.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE (CONTINUED) USE OF CONSULTANTS FUNDED BY BORROWERS Escrow Account Funding and Payments §§...

  14. 7 CFR 1789.168-1789.175 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 12 2010-01-01 2010-01-01 false 1789.168-1789.175 Section 1789.168-1789.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE (CONTINUED) USE OF CONSULTANTS FUNDED BY BORROWERS Escrow Account Funding and Payments §§...

  15. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 42 Public Health 2 2011-10-01 2011-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  16. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 42 Public Health 2 2012-10-01 2012-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  17. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 2 2014-10-01 2014-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  18. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  19. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 2 2013-10-01 2013-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  20. 49 CFR 175.3 - Unacceptable hazardous materials shipments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Unacceptable hazardous materials shipments. 175.3 Section 175.3 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations...

  1. 49 CFR 175.3 - Unacceptable hazardous materials shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Unacceptable hazardous materials shipments. 175.3... General Information and Regulations § 175.3 Unacceptable hazardous materials shipments. A hazardous material that is not prepared for shipment in accordance with this subchapter may not be offered...

  2. 49 CFR 175.3 - Unacceptable hazardous materials shipments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Unacceptable hazardous materials shipments. 175.3... General Information and Regulations § 175.3 Unacceptable hazardous materials shipments. A hazardous material that is not prepared for shipment in accordance with this subchapter may not be offered...

  3. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  4. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 13 Business Credit and Assistance 1 2014-01-01 2014-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  5. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 13 Business Credit and Assistance 1 2013-01-01 2013-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  6. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... utility's facilities, the customer shall be responsible for obtaining all rights-of-way necessary to...

  7. 46 CFR 175.900 - OMB control numbers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... information collection requirement. (b) Display. 46 CFR Section where identified Current OMB Control Number... 46 Shipping 7 2010-10-01 2010-10-01 false OMB control numbers. 175.900 Section 175.900 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS...

  8. 20 CFR 401.175 - Government Accountability Office.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 2 2011-04-01 2011-04-01 false Government Accountability Office. 401.175... RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government Accountability Office. We disclose information to the Government Accountability Office when that agency needs...

  9. 20 CFR 401.175 - Government Accountability Office.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 2 2014-04-01 2014-04-01 false Government Accountability Office. 401.175... RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government Accountability Office. We disclose information to the Government Accountability Office when that agency needs...

  10. 20 CFR 401.175 - Government Accountability Office.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 2 2012-04-01 2012-04-01 false Government Accountability Office. 401.175... RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government Accountability Office. We disclose information to the Government Accountability Office when that agency needs...

  11. 50 CFR 622.173-622.175 - [Reserved

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 50 Wildlife and Fisheries 12 2014-10-01 2014-10-01 false 622.173-622.175 Section 622.173-622.175 Wildlife and Fisheries FISHERY CONSERVATION AND MANAGEMENT, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE FISHERIES OF THE CARIBBEAN, GULF OF MEXICO, AND SOUTH ATLANTIC Snapper-Grouper...

  12. 21 CFR 175.210 - Acrylate ester copolymer coating.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Acrylate ester copolymer coating. 175.210 Section 175.210 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS...

  13. 7 CFR 800.175 - Termination of licenses.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 7 2010-01-01 2010-01-01 false Termination of licenses. 800.175 Section 800.175 Agriculture Regulations of the Department of Agriculture (Continued) GRAIN INSPECTION, PACKERS AND STOCKYARD ADMINISTRATION (FEDERAL GRAIN INSPECTION SERVICE), DEPARTMENT OF AGRICULTURE GENERAL REGULATIONS Licenses and Authorizations (for Individuals...

  14. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  15. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  16. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  17. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  18. 21 CFR 175.300 - Resinous and polymeric coatings.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Resinous and polymeric coatings. 175.300 Section 175.300 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings...

  19. 21 CFR 175.300 - Resinous and polymeric coatings.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Resinous and polymeric coatings. 175.300 Section 175.300 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of...

  20. Degenerate mixtures of rubidium and ytterbium for engineering open quantum systems

    NASA Astrophysics Data System (ADS)

    Vaidya, Varun Dilip

    In the last two decades, experimental progress in controlling cold atoms and ions now allows us to manipulate fragile quantum systems with an unprecedented degree of precision. This has been made possible by the ability to isolate small ensembles of atoms and ions from noisy environments, creating truly closed quantum systems which decouple from dissipative channels. However in recent years, several proposals have considered the possibility of harnessing dissipation in open systems, not only to cool degenerate gases to currently unattainable temperatures, but also to engineer a variety of interesting many-body states. This thesis will describe progress made towards building a degenerate gas apparatus that will soon be capable of realizing these proposals. An ultracold gas of ytterbium atoms, trapped by a species-selective lattice will be immersed into a Bose-Einstein condensate (BEC) of rubidium atoms which will act as a bath. Here we describe the challenges encountered in making a degenerate mixture of rubidium and ytterbium atoms and present two experiments performed on the path to creating a controllable open quantum system. The first experiment will describe the measurement of a tune-out wavelength where the light shift of 87Rb vanishes. This wavelength was used to create a species-selective trap for ytterbium atoms. Furthermore, the measurement of this wavelength allowed us to extract the dipole matrix element of the 5s → 6p transition in 87Rb with an extraordinary degree of precision. Our method to extract matrix elements has found use in atomic clocks where precise knowledge of transition strengths is necessary to account for minute blackbody radiation shifts. The second experiment will present the first realization of a degenerate Bose-Fermi mixture of rubidium and ytterbium atoms. Using a three-color optical dipole trap (ODT), we were able to create a highly-tunable, species-selective potential for rubidium and ytterbium atoms which allowed us to use 87

  1. DIVALENT LANTHANIDE CHEMISTRY; BIS (PENTAMETHYLCYCLOPENTADIENYL) EUROPIUM(II) AND YTTERBIUM(II) DERIVATIVES: CRYSTAL STRUCTURE OF BIS(PENTAMETHYLCYCLOPENTADIENYL) YTTERBIUM (II)TETRAHYDROFURAN HEMI (TOLUENE) AT 176K

    SciTech Connect

    Tilley, T.Don; Andersen, Richard A.; Spencer, Brock; Ruben, Helena; Zalkin, Allan; Templeton, David H.

    1980-04-01

    Red, paramagnetic ({mu}{sub B} = 7.99 B.M., 5-50K) bis(pentamethylcyclopentadienyl) europium (II)(tetrahydrofuran)(diethylether), (Me{sub 5}C{sub 5}){sub 2}Eu(THF)(Et{sub 2}O) is isolated from reaction of three molar equivalents of sodium pentamethylcyclopentadienide and europium trichloride in refluxing tetrahydrofuran, after crystallization from diethyl ether. The monotetrahydrofuran complex, (Me{sub 5}C{sub 5}){sub 2}Eu(THF), may be isolated by use of toluene rather than diethyl ether as the crystallization solvent. Red, diamagnetic bis(pentamethylcyclopentadienyl)ytterbium(II)(tetrahydrofuran) is isolated from the reaction of ytterbium dichloride and sodium pentamethylcyclopentadienide in refluxing tetrahydrofuran. The diethyl ether complex, (Me{sub 5}C{sub 5}){sub 2}Yb(OEt{sub 2}), may be isolated by crystallization of the tetrahydrofuran complex from diethylether, The hemi-toluene complex, (Me{sub 5}C{sub 5}){sub 2} Yb(THF) {center_dot} 1/2 toluene, can be isolated by recrystallization of the tetrahydrofuran complex from toluene. As these divalent metallocenes are the first hydrocarbon-soluble lanthanide derivatives to be isolated we have examined the latter complex by X-ray crystallography. Crystals of (Me{sub 5}C{sub 5}){sub 2}Yb(OC{sub 4}H{sub 8}) {center_dot} 1/2(C{sub 6}H{sub 5}cH{sub 3}) crystalline in the monoclinic system, P2{sub 1}/n, with a = 11.358(8) {angstrom}, b = 21.756(19) {angstrom}, c = 10.691(7) {angstrom}, and {beta} = 101.84(5){sup o} at 176K. For Z = 4 the calculated density is 1.37 g cm{sup -3}. The ytterbium atom is coordinated to the oxygen atom of a tetrahydrofuran molecule and to two pentamethyl cyclopentadienyl rings. The molecule has approximate c{sub 2} symmetry about the Yb-0 bond. The Yb-0 distance is 2.41 {angstrom}, the Yb-C distances average 2.66 {angstrom}, and the Yb-Cp (centroid) distances average 2.37 {angstrom}. The Me{sub 5}C{sub 5} rings are in a staggered configuration with respect to each other. The methyl groups of

  2. Facility No. 175, exterior oblique view of northeast and northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  3. Facility No. 175, elevation of southeast side from the airfield, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, elevation of southeast side from the airfield, corner of Facility No. 176 is to the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  4. Facility No. 175, interior of office space on second floor ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior of office space on second floor of northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  5. Facility No. 175, interior overview from secondfloor corridor on northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior overview from second-floor corridor on northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  6. Facility No. 175, interior detail showing rolling doors, trusses, and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior detail showing rolling doors, trusses, and angled monitor roof - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  7. Interior view of 175 ton hoist house looking at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of 175 ton hoist house looking at the exterior casing for the wire rope spools. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

  8. View of 175 ton hoisthouse from northeast. Hoist operator's cab ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

  9. 175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ELEVATOR ADDITION OF 1905. WALL IS EXTERIOR OF ORIGINAL WAGON WORKS OF 1883. - Gruber Wagon Works, Pennsylvania Route 183 & State Hill Road at Red Bridge Park, Bernville, Berks County, PA

  10. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter...

  11. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter...

  12. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (CONTINUED) STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES Standards of Performance for Primary Zinc Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter...

  13. 175. Frank Deras Jr., Photographer May 1998 AERIAL ELEVATION VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Frank Deras Jr., Photographer May 1998 AERIAL ELEVATION VIEW OF TOWER W-2, FACING NORTHWEST. - San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

  14. Atomic Mass and Nuclear Binding Energy for I-175 (Iodine)

    NASA Astrophysics Data System (ADS)

    Sukhoruchkin, S. I.; Soroko, Z. N.

    This document is part of the Supplement containing the complete sets of data of Subvolume A `Nuclei with Z = 1 - 54' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms'. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope I-175 (Iodine, atomic number Z = 53, mass number A = 175).

  15. Pump-Induced, Dual-Frequency Switching in a Short-Cavity, Ytterbium-Doped Fiber Laser

    SciTech Connect

    Guan, W.; Marciante, J.R.

    2008-07-23

    Using a short linear cavity composed of a section of highly ytterbium-doped fiber surrounded by two fiber Bragg gratings, dual frequency switching is achieved by tuning the pump power of the laser. The dual-frequency switching is generated by the thermal effects of the absorbed pump in the ytterbium-doped fiber. At each frequency, the laser shows single-longitudinal-mode behavior. In each single-mode regime, the optical signal-to-noise ratio of the laser is greater than 50 dB. The dual-frequency, switchable, fiber laser can be designed for various applications by the careful selection of the two gratings.

  16. A switchable and tunable ytterbium-doped fiber ring laser with a Sagnac loop mirror

    NASA Astrophysics Data System (ADS)

    Wang, Xiao-liang; Chen, Da-ru; Ma, Xiao-wei; Li, Hai-tao; Luo, Shu-jun

    2016-07-01

    A switchable and tunable ytterbium-doped fiber ring laser (YDFL) is reported and demonstrated. Employing a Sagnac loop mirror fabricated by an 85-cm-long polarization-maintaining fiber (PMF), the proposed YDFL can operate with stable dual-wavelength lasing or tunable single-wavelength lasing around 1 064 nm. Both stable dual-wavelength lasing and tunable single-wavelength lasing are achieved by adjusting a polarization controller in the Sagnac loop mirror. The experimental results show that the output of the proposed fiber laser with two different operation modes is rather stable at room temperature.

  17. Theoretical study on isotope separation of an ytterbium atomic beam by laser deflection

    NASA Astrophysics Data System (ADS)

    Zhou, Min; Xu, Xin-Ye

    2014-01-01

    Isotope separation by laser deflecting an atomic beam is analyzed theoretically. Interacting with a tilted one-dimensional optical molasses, an ytterbium atomic beam is split into multi-beams with different isotopes like 172Yb,173Yb, and 174Yb. By using the numerical calculation, the dependences of the splitting angle on the molasses laser intensity and detuning are studied, and the optimal parameters for the isotope separation are also investigated. Furthermore, the isotope separation efficiency and purity are estimated. Finally a new scheme for the efficient isotope separation is proposed. These findings will give a guideline for simply obtaining pure isotopes of various elements.

  18. Optical excitation and decay dynamics of ytterbium atoms embedded in a solid neon matrix.

    SciTech Connect

    Xu, C.-Y.; Hu, S.-M.; Singh, J.; Bailey, K.; Lu, Z.-T.; Mueller, P.; O'Connor, T. P.; Welp, U.

    2011-09-01

    Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p {sup 3}P{sub 0} level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.

  19. Optical Excitation and Decay Dynamics of Ytterbium Atoms Embedded in a Solid Neon Matrix

    SciTech Connect

    Xu, C.-Y.; Lu, Z.-T.; Hu, S.-M.; Singh, J.; Bailey, K.; Mueller, P.; O'Connor, T. P.; Welp, U.

    2011-08-26

    Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p {sup 3}P{sub 0} level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous.

  20. Optical excitation and decay dynamics of ytterbium atoms embedded in a solid neon matrix.

    PubMed

    Xu, C-Y; Hu, S-M; Singh, J; Bailey, K; Lu, Z-T; Mueller, P; O'Connor, T P; Welp, U

    2011-08-26

    Neutral ytterbium atoms embedded in solid neon qualitatively retain the structure of free atoms. Despite the atom-solid interaction, the 6s6p ³P(0) level is found to remain metastable with its lifetimes determined to be in the range of ten to hundreds of seconds. The atomic population can be almost completely transferred between the ground level and the metastable level via optical excitation and spontaneous decay. The dynamics of this process is examined and is used to explicitly demonstrate that the transition broadening mechanism is homogeneous. PMID:21929234

  1. Cladding-pumped ytterbium-doped fiber laser with radially polarized output.

    PubMed

    Lin, Di; Daniel, J M O; Gecevičius, M; Beresna, M; Kazansky, P G; Clarkson, W A

    2014-09-15

    A simple technique for directly generating a radially polarized output beam from a cladding-pumped ytterbium-doped fiber laser is reported. Our approach is based on the use of a nanograting spatially variant waveplate as an intracavity polarization-controlling element. The laser yielded ~32 W of output power (limited by available pump power) with a radially polarized TM (01)-mode output beam at 1040 nm with a corresponding slope efficiency of 66% and a polarization purity of 95%. The beam-propagation factor (M(2)) was measured to be ~1.9-2.1. PMID:26466271

  2. Single-Polarisation, Single-Frequency, 2 cm Ytterbium-Doped Fibre Laser

    SciTech Connect

    Guan, W.; Marciante, J.R.

    2007-05-23

    A single-polarisation, single-frequency, ytterbium-doped silica fibre laser has been demonstrated in a 2 cm linear cavity. The output power reaches 35 mW with an optical signal-to-noise ratio greater than 65 dB. A polarisation-maintaining fibre Bragg grating is used as the polarisation-dependent reflector to generate the single-polarisation output with the polarisation extinction ratio greater than 20 dB. The laser works stably for two hours under laboratory conditions.

  3. The crucial fiber components and gain fiber for high power ytterbium-doped fiber laser

    NASA Astrophysics Data System (ADS)

    Liao, Lei; Liu, Peng; Xing, Ying-Bin; Wang, Yi-Bo; Dai, Neng-Li; Li, Jin-Yan; He, Bing; Zhou, Jun

    2015-08-01

    We have demonstrated a kW continuous-wave ytterbium-doped all-fiber laser oscillator with 7×1 fused fiber bundle combiner, fiber Bragg grating (FBG) and double-clad gain fiber fabricated by corresponding technologies. The results of experiment that the oscillator had operated at 1079.48nm with 80.94% slope efficiency without the influence of temperature and non-linear effects indicate that fiber components and gain fiber were suitable to high power environment. No evidence of the signal power roll-over showed that this oscillator possess the capacity to highest output with available pump power.

  4. Incorporation of strain hardening in piezoresistance analysis: Application to ytterbium foils in a PMMA matrix

    SciTech Connect

    Gupta, Y.M.; Gupta, S.C.

    1987-01-15

    The results of an earlier paper are extended to include strain hardening in the analytic model for piezoresistance. This development is necessary to model the gauge hysteresis observed in the experimental data. Analytic developments to incorporate strain hardening in the theoretical formalism and procedures to calculate the gauge response are described. The analytic model is used to calculate the response of ytterbium (Yb) foils in a polymethylmethacrylate matrix in both shock wave and quasi-static experiments. Good agreement is observed between the model predictions and experimental results. Difficulties in calculating the lateral gauge response when the matrix material is inelastic are discussed.

  5. A harmonically mode-locked dark soliton and bright–dark soliton pair ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Lv, Zhiguo; Teng, Hao; Fang, Shaobo; Jia, Haotian; Wang, Lina; Wang, Junli; Wei, Zhiyi

    2016-06-01

    We report on an experimental study of a dark soliton and bright–dark soliton pair, harmonically mode-locked, all normal dispersion (ANDi) ytterbium fiber laser with a long cavity length. Mode-locked output up to the fourth harmonic with respect to the fundamental repetition rate has been realized. To the best of our knowledge, this the first such demonstration so far in ANDi mode-locked ytterbium fiber lasers with a birefringence filter as spectral modulation component. The experimentally recorded mode-locked spectrum shows that the generation of a dark soliton is always accompanied by strong continuous-wave emission. Furthermore, by changing the pump power, the fundamental bright–dark soliton pair mode-locked operation can be evolved into the state of the second order bright soliton coexisting with the fundamental dark soliton. Additionally, bright–dark soliton pairs, which are symmetric relative to the vertical coordinate, can be interconverted by rotating waveplates in a fixed maximum pump power condition. The generation of the dark pulse is probably due to the large normal dispersion introduced in the ring cavity except for the nonlinearity.

  6. Power Scaling of Single-Frequency Hybrid Brillouin/Ytterbium Fiber Lasers

    SciTech Connect

    Guan, W.; Marciante, J.R.

    2010-06-22

    A coupled-wave rate-equation model, including multiple-order stimulated Brillouin scattering (SBS), is used to study power scaling of hybrid Brillouin/ytterbium fiber lasers. To validate the model, a single-frequency, Brillouin/ytterbium fiber laser was built with a laser output of 40 mW and an optical signal-to-noise ratio greater than 50 dB. The numerical model simulation agrees with the measurements in both fully and partially injection locked regimes. To scale up the laser’s output power, a dual-clad architecture is proposed. In this new configuration, the active Yb-doped fiber provides the nonlinear SBS gain as well as the gain resulting from the excited Yb ions. Numerical modeling including three Stokes orders shows that over 5 W of single-frequency laser output can be achieved with a side-mode suppression ratio (SMSR) of greater than 80 dB. Beyond this power, multi-order SBS affects the laser efficiency and SMSR.

  7. Research on ytterbium-doped photonic crystal fiber amplifier for the femtosecond fiber laser

    NASA Astrophysics Data System (ADS)

    Tian, Hongchun; Hou, Zhiyun; Zhang, Sa; Zhou, Guiyao; Xia, Changming; Zhang, Wei; Wu, Jiale; liu, Hongzhan; Zheng, Yan

    2016-01-01

    We report on a single-stage, high-repetition photonic crystal fiber amplifier working at 1030 nm seeded by a femtosecond fiber laser, which generates an output with average power of 2.23 W at a repetition rate of 49.5 MHz and a 3 dB spectral width of 5 nm, corresponding to a pulse energy of 45.2 nJ. After amplification, the spectrum of the femtosecond laser is broadened. A home-made, ytterbium-doped, double-clad photonic crystal fiber fabricated by laser sintering technology combined with a solution doping method with a core diameter of only 24 μm is used as the power amplifier medium. The spectral characteristics as well as the suppression of amplified spontaneous emission are discussed in detail. Experiment confirms that the amplified spontaneous emission becomes negligible with increasing incident seed power and no obvious nonlinear effects arise in this experiment. These results can provide motivation for the application of ytterbium-doped photonic crystal fiber and can provide a potential application for the high-power, all-fiber laser in the future.

  8. Determination of ytterbium in animal faeces by tungsten coil electrothermal atomic absorption spectrometry.

    PubMed

    Lima, E C; Krug, F J; Nóbrega, J A; Nogueira, A R

    1998-11-01

    A method for ytterbium determination in animal faeces by tungsten coil electrothermal atomic absorption spectrometry (TCAAS) was developed. Faeces were dry-ashed in a muffle furnace, the ashes were treated with hydrochloric acid, and 10 mul of sample solution were delivered into 150-W tungsten coil atomizer. A matrix-matching procedure employing a 66-s heating program proved to be efficient for obtaining accurate results. Characteristic mass and detection limit were 7.1 pg and 0.35 mug g(-1) Yb, respectively. The tungsten coil atomizer lifetime exceeded 300 firings with digested solutions and R.S.D. of measurements was 1.9% after ten consecutive injections of 10.0 mug l(-1) Yb. Accuracy of the proposed method was assessed by employing a graphite furnace atomic absorption spectrometric procedure. Application of the paired t-test did not reveal any significant difference for ytterbium contents determined by both methods at 95% confidence level. It was demonstrated that the proposed procedure can successfully be used for evaluation of kinetic passage rate of feed through digestive tract of animals. PMID:18967363

  9. Usefulness of ytterbium(III) as analytical reagent for total sulfite determination in white wine samples.

    PubMed

    Rodríguez-Díaz, Rafael Carlos; Aguilar-Caballos, Maria Paz; Gómez-Hens, Agustina

    2004-12-29

    Ytterbium(III) is used as reagent for the determination of sulfite by measuring the formation of the Yb(III)-sulfite complex through the variation of the light scattering intensity with time. The low solubility of this complex causes an efficient dispersion of the radiation at 490 nm, which is measured at 980 nm. Each kinetic datum is automatically obtained in only 0.5 s by stopped-flow mixing technique. The application of the initial rate method using a long emission wavelength minimizes the potential interference of fluorescent background signals from the sample matrix. The dynamic range of the calibration graph is 1-250 microg/mL, and the calculated detection limit is 0.35 microg/mL. The precision, expressed as relative standard deviation, is <6%. The method has been applied to the determination of total sulfites in white wine samples, which requires only the sample dilution and the use of two aliquots to improve selectivity. However, the matrix effect found for red wines precludes the application of the method to the direct analysis of these samples. Analytical recoveries ranged from 96.0 to 106.7%. The results obtained with the proposed method agreed with those provided by the p-rosaniline method. Unlike this method, in which toxic reagents are required, the use of ytterbium(III) as analytical reagent shows the advantage of its low acute toxic rating. PMID:15612754

  10. Highly selective and responsive visible to near-IR ytterbium emissive probe for monitoring mercury(II).

    PubMed

    Zhang, Tao; Chan, Chi-Fai; Lan, Rongfeng; Wong, Wai-Kwok; Wong, Ka-Leung

    2014-01-20

    A new lanthanide probe based on the fluorescence resonance energy transfer (FRET) process with the combination of ytterbium porphyrinate complex and a rhodamine B derivative unit was synthesized to detect the Hg(2+) ion with responsive emission in the visible and near-IR region with a detection limit of 10 μM. PMID:24425677

  11. Surprisingly bright near-infrared luminescence and short radiative lifetimes of ytterbium in hetero-binuclear Yb-Na chelates.

    PubMed

    Shavaleev, Nail M; Scopelliti, Rosario; Gumy, Frédéric; Bünzli, Jean-Claude G

    2009-08-17

    New heterobinuclear lanthanide complexes with benzoxazole-substituted 8-hydroxyquinolines, [Ln(ligand)(2)(mu-ligand)(2)Na] (Ln: Yb, Lu), have been prepared and their structure established by X-ray crystallography, (1)H NMR spectroscopy, and photophysical studies. The complexes display efficient ligand-sensitized near-infrared luminescence of ytterbium at 925-1075 nm with lifetimes and quantum yields as high as 22 micros and 3.7%, in the solid state, and 20 micros and 2.6% in CH(2)Cl(2) solution, respectively. These quantum yields are the highest reported to date for ytterbium complexes with organic ligands containing C-H bonds. A long-wavelength and intense intraligand charge-transfer transition (lambda(max) = 446-456 nm; epsilon approximately 1.2 x 10(4) M(-1) cm(-1)) allows for the excitation of infrared luminescence with visible light up to 600 nm. Remarkable features of these complexes include (i) quantitative ligand-to-Yb(III) energy transfer resulting in high overall efficiency of the ytterbium luminescence, (ii) unusually short radiative lifetime of the Yb(III) ion, 706-745 micros for solutions in CH(2)Cl(2), calculated from the f-f absorption spectra, and 513-635 micros estimated for solid state samples from quantum yield and lifetime data, and (iii) the unexpected large influence of second-sphere composition on the radiative lifetime of ytterbium. PMID:19555059

  12. Note: 15-fs, 15-μJ green pulses from two-stage temporal compressor of ytterbium laser pulses.

    PubMed

    Konyashchenko, A V; Kostryukov, P V; Losev, L L; Tenyakov, S Yu

    2012-10-01

    15-fs, 15-μJ light pulses at the central wavelength of 515 nm were generated by two-stage nonlinear compression of 300-fs, 150-μJ ytterbium laser pulses. The compression was based on the pulse spectrum broadening by self-phase modulation in gas filled capillary and second harmonic generation in crystal. PMID:23126820

  13. High-quality laser cutting of stainless steel in inert gas atmosphere by ytterbium fibre and CO{sub 2} lasers

    SciTech Connect

    Golyshev, A A; Malikov, A G; Orishich, A M; Shulyat'ev, V B

    2014-03-28

    Processes of cutting stainless steel by ytterbium fibre and CO{sub 2} lasers have been experimentally compared. The cut surface roughnesses for 3- and 5-mm-thick stainless steel sheets are determined. The absorption coefficient of laser radiation during cutting is measured. It is established that the power absorbed by metal during cutting by the CO{sub 2} laser exceeds that for the ytterbium laser (provided that the cutting speed remains the same). The fact that the maximum cutting speed of the CO{sub 2} laser is lower than that of the ytterbium fibre laser is explained. (laser technologies)

  14. Bis(pentamethylcyclopentadienyl) ytterbium: Electron-transfer reactions with organotransition metal complexes

    SciTech Connect

    Matsunaga, P.T.

    1991-11-01

    The divalent lanthanide complex, (Me{sub 5}C{sub 5}){sub 2}Yb, reacts with methylcopper to produce the base-free, ytterbium-methyl complex, (Me{sub 5}C{sub 5}){sub 2}YbMe. This product forms a asymmetric, methyl-bridged dimer in the solid state. The bulky alkyl complex, (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}, displays similar chemistry to (Me{sub 5}C{sub 5}){sub 2}YbMe, but at a reduced reaction rate due to the limited accessibility of the metal in (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}. Copper and silver halide salts react with (Me{sub 5}C{sub 5}){sub 2}V to produce the trivalent halide derivatives, (Me{sub 5}C{sub 5}){sub 2}VX (X + F, Cl, Br, I). The chloride complex, (Me{sub 5}C{sub 5}){sub 2}VCl, reacts with lithium reagents to form the phenyl and borohydride species. Nitrous oxide transfers an oxygen atom to (Me{sub 5}C{sub 5}){sub 2}V producing the vanadium-oxo complex, (Me{sub 5}Ce{sub 5}){sub 2}VO. The trivalent titanium species, (Me{sub 5}C{sub 5}){sub 2}TiX (X = Cl, Br, Me, BH{sub 4}), form bimetallic coordination complexes with (Me{sub 5}C{sub 5}){sub 2}Yb. The magnetic behavior of the products indicates that electron transfer has not occurred. The solid state structures of the chloride and bromide complexes show unusual bend angles for the halide bridges between ytterbium and titanium. A model based on frontier orbital theory has been proposed to account for the bending behavior in these species. The bimetallic methyl complex contains a linear methyl bridge between ytterbium and titanium.

  15. 40 CFR 152.175 - Pesticides classified for restricted use.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 24 2014-07-01 2014-07-01 false Pesticides classified for restricted...) PESTICIDE PROGRAMS PESTICIDE REGISTRATION AND CLASSIFICATION PROCEDURES Classification of Pesticides § 152.175 Pesticides classified for restricted use. The following uses of pesticide products containing...

  16. Facility No. 175, oblique view of southwest doors and northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, oblique view of southwest doors and northwest side, corner of Facility No. 176 is on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  17. Airfield setting of Facility Nos. 175 and 176, taken from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Airfield setting of Facility Nos. 175 and 176, taken from north end of Ford Island Runway, with landplane hangars on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  18. Facility No. 175, oblique view of southeast side and southwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, oblique view of southeast side and southwest doors, corner of Facility No. 176 is on the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  19. 175. Photocopy of Photograph (original in Roger Lewis' private collection). ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Photocopy of Photograph (original in Roger Lewis' private collection). Photographer and date unknown. CENTER ISLAND, CRAWFORD WATER WHEEL, TWIN FALLS COUNTY, MILNER, IDAHO; LOOKING DOWNSTREAM FROM DAM SITE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  20. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  1. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  2. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  3. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  4. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  5. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  6. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  7. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  8. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  9. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  10. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 18 Conservation of Power and Water Resources 1 2011-04-01 2011-04-01 false Account 175, Derivative instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 2005, FEDERAL POWER ACT AND NATURAL GAS...

  11. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  12. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  13. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  14. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  15. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  16. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... water conservation expenditures which the taxpayer may deduct under section 175 in any one taxable year... upon which expenditures are made for soil or water conservation or for the prevention of erosion of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  17. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  18. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  19. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  20. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  1. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  2. 40 CFR 63.175 - Quality improvement program for valves.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 10 2014-07-01 2014-07-01 false Quality improvement program for valves... improvement program for valves. (a) In Phase III, an owner or operator may elect to comply with one of the... § 63.168 and § 63.175. (1) If the owner or operator elects to continue the quality improvement...

  3. 40 CFR 63.175 - Quality improvement program for valves.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 10 2013-07-01 2013-07-01 false Quality improvement program for valves... improvement program for valves. (a) In Phase III, an owner or operator may elect to comply with one of the... §§ 63.168 and 63.175. (1) If the owner or operator elects to continue the quality improvement...

  4. 40 CFR 63.175 - Quality improvement program for valves.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 10 2012-07-01 2012-07-01 false Quality improvement program for valves... improvement program for valves. (a) In Phase III, an owner or operator may elect to comply with one of the... §§ 63.168 and 63.175. (1) If the owner or operator elects to continue the quality improvement...

  5. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  6. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  7. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives. Pressure-sensitive... accordance with a prior sanction or approval. (3) Color additives listed for use in or on food in parts 73... with isobutylene so that the butyl content of the final product is not less than 18 percent, for use...

  8. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... of training provided—classroom, classroom plus on the job, on the job; and (2) The type of competency... the most recent change that triggered management of change procedures and the date of the most...

  9. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... of training provided—classroom, classroom plus on the job, on the job; and (2) The type of competency... the most recent change that triggered management of change procedures and the date of the most...

  10. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... of training provided—classroom, classroom plus on the job, on the job; and (2) The type of competency... the most recent change that triggered management of change procedures and the date of the most...

  11. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... of training provided—classroom, classroom plus on the job, on the job; and (2) The type of competency... the most recent change that triggered management of change procedures and the date of the most...

  12. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... of training provided—classroom, classroom plus on the job, on the job; and (2) The type of competency... the most recent change that triggered management of change procedures and the date of the most...

  13. 40 CFR 63.175 - Quality improvement program for valves.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 9 2011-07-01 2011-07-01 false Quality improvement program for valves... improvement program for valves. (a) In Phase III, an owner or operator may elect to comply with one of the... § 63.168 and § 63.175. (1) If the owner or operator elects to continue the quality improvement...

  14. 37 CFR 2.175 - Correction of mistake by owner.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ..., DEPARTMENT OF COMMERCE RULES OF PRACTICE IN TRADEMARK CASES Correction, Disclaimer, Surrender, Etc. § 2.175... the registration, someone with legal authority to bind the owner (e.g., a corporate officer or general... payment of the required fee, provided that the correction does not involve such changes in...

  15. Thermo-optical measurements of ytterbium doped ceramics (Sc2O3, Y203, Lu203, YAG) and crystals (YAG, CaF2) at cryogenic temperatures

    NASA Astrophysics Data System (ADS)

    Le Garrec, B.; Cardinali, V.; Bourdet, G.

    2013-05-01

    In this paper, we report the measurements of the specific heat, the density and the thermal diffusivity at room and cryogenic temperatures of Ytterbium doped cubic sesquioxides (Sc2O3, Y2O3, Lu2O3) ceramics and of Ytterbium doped crystals (YAG, CaF2). These materials appear to have very interesting properties for setting up high average power laser chains useful for plasma physics and for inertial fusion energy drivers.

  16. Bis(pentamethylcyclopentadienyl)ytterbium: An investigation of weak interactions in solution using multinuclear NMR spectroscopy

    SciTech Connect

    Schwartz, D.J.

    1995-07-01

    NMR spectroscopy is ideal for studying weak interactions (formation enthalpy {le}20 kcal/mol) in solution. The metallocene bis(pentamethylcyclopentadienyl)ytterbium, Cp*{sub 2}Yb, is ideal for this purpose. cis-P{sub 2}PtH{sub 2}complexes (P = phosphine) were used to produce slow-exchange Cp*{sub 2}YbL adducts for NMR study. Reversible formation of (P{sub 2}PtH){sub 2} complexes from cis-P{sub 2}PtH{sub 2} complexes were also studied, followed by interactions of Cp*{sub 2}Yb with phosphines, R{sub 3}PX complexes. A NMR study was done on the interactions of Cp*{sub 2}Yb with H{sub 2}, CH{sub 4}, Xe, CO, silanes, stannanes, C{sub 6}H{sub 6}, and toluene.

  17. Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms

    SciTech Connect

    Hosoya, Toshiyuki; Miranda, Martin; Inoue, Ryotaro; Kozuma, Mikio

    2015-07-15

    We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources for laser cooling experiments including transportable optical lattice clocks.

  18. A compact ultranarrow high-power laser system for experiments with 578 nm ytterbium clock transition

    SciTech Connect

    Cappellini, G.; Lombardi, P.; Mancini, M.; Pagano, G.; Pizzocaro, M.; Fallani, L.; Catani, J.

    2015-07-15

    In this paper, we present the realization of a compact, high-power laser system able to excite the ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to an ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic {sup 173}Y b with a <50 Hz linewidth over 5 min, limited only by a residual frequency drift of some 0.1 Hz/s.

  19. A compact ultranarrow high-power laser system for experiments with 578 nm ytterbium clock transition

    NASA Astrophysics Data System (ADS)

    Cappellini, G.; Lombardi, P.; Mancini, M.; Pagano, G.; Pizzocaro, M.; Fallani, L.; Catani, J.

    2015-07-01

    In this paper, we present the realization of a compact, high-power laser system able to excite the ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to an ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic 173Y b with a <50 Hz linewidth over 5 min, limited only by a residual frequency drift of some 0.1 Hz/s.

  20. Highly efficient ytterbium-doped phosphosilicate fiber lasers operating below 1020 nm.

    PubMed

    Gu, Guancheng; Liu, Zhengyong; Kong, Fanting; Tam, Hwayaw; Shori, Ramesh K; Dong, Liang

    2015-07-13

    Highly-efficient high-power fiber lasers operating at wavelength below 1020 nm are critical for tandem-pumping in >10 kW fiber lasers to provide high pump brightness and low thermal loading. Using an ytterbium-doped-phosphosilicate double-clad leakage-channel fiber with ~50 µm core and ~420 µm cladding, we have achieved ~70% optical-to-optical efficiency at 1018 nm. The much larger cladding than those in previous reports demonstrates the much lower required pump brightness, a key for efficient kW operation. The demonstrated 1018 nm fiber laser has ASE suppression of ~41 dB. This is higher than previous reports and further demonstrates the advantages of the fiber used. Limiting factors to efficiency are also systematically studied. PMID:26191831

  1. 146W continuous wave ytterbium doped fiber amplifier at 1009 nm

    NASA Astrophysics Data System (ADS)

    Beier, F.; Otto, H.-J.; Sattler, B.; Ploetner, M.; Haarlammert, N.; de Vries, O.; Jauregui, C.; Schreiber, T.; Limpert, J.; Eberhardt, R.; Tünnermann, A.

    2014-03-01

    In this contribution we demonstrate a single mode continuous wave laser amplifier with 146 W of power at a wavelength of 1009 nm. On one hand this experiments constitutes an extension of the wavelength range of high power fiber lasers, furthermore, emission wavelength well below 1030 nm find use for efficient high-brightness tandem pumping of high power fiber amplifiers. The wavelength and bandwidth of the seed oscillator are defined by a pair of fiber Bragg gratings. This seed is amplified in a two-stage Ytterbium-doped rod-type amplifier to 146 W with a high slope efficiency of 64 %, an excellent beam quality and an ASE-suppression as high as 63 dB.

  2. Tapered inner-cladding fiber design for uniform heat deposition in Ytterbium-doped fiber amplifiers

    NASA Astrophysics Data System (ADS)

    Huang, Zhihua; Zhang, Yongliang; Deng, Ying; Lin, Honghuan; Li, Qi; Zhao, Lei; Wang, Jianjun

    2015-04-01

    A method for designing double-clad fiber with tapered inner cladding and uniform core is proposed for linear pump power profile, i.e. uniform heat deposition, in the ytterbium-doped fiber amplifier. The analytical formula for the inner-cladding diameter profile along the fiber is given. The inner-cladding diameter near the pump injection port is determined purely by the diameter of the doped region, the number density of the doped ions, the absorption cross section at the pump wavelength and the length of the fiber. The simplified linearly varying inner-cladding diameter is proven to have a smoother heat deposition profile with lower maximum thermal load in both the co-pumping scheme and the counter-pumping scheme.

  3. Arc fusion splicing effects in large-mode-area single-mode ytterbium-doped fibers.

    PubMed

    Feng, Ting; Jenkins, Micah H; Yan, Fengping; Gaylord, Thomas K

    2013-11-10

    For the first time the effects of arc fusion splicing on the residual stress and refractive index of large-mode-area single-mode ytterbium-doped fibers (YDFs) are investigated using a state-of-the-art three-dimensional concurrent stress-index measurement method. The results, based on a commercially available fiber, describe a host of perturbations that decrease the core/cladding refractive index difference by as much as 1.74 × 10(-3) over an axial length of many hundreds of wavelengths. Simulations indicate that these perturbations result in an expansion of the mode-field-diameter by 39.6% and, based on the measured sample, result in an extra splice loss of 20.8%. The results of this investigation will be useful in the design and optimization of high-power all-fiber YDF lasers and amplifiers. PMID:24216728

  4. Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

    NASA Astrophysics Data System (ADS)

    Duchez, Jean-Bernard; Mady, Franck; Mebrouk, Yasmine; Benabdesselam, Mourad

    2014-10-01

    We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding).

  5. Doppler spectroscopy of an ytterbium Bose-Einstein condensate on the clock transition

    NASA Astrophysics Data System (ADS)

    Dareau, A.; Scholl, M.; Beaufils, Q.; Döring, D.; Beugnon, J.; Gerbier, F.

    2015-02-01

    We describe Doppler spectroscopy of Bose-Einstein condensates of ytterbium atoms using a narrow optical transition. We address the optical clock transition around 578 nm between the 1S0 and the 3P0 states with a laser system locked on a high-finesse cavity. We show how the absolute frequency of the cavity modes can be determined within a few tens of kilohertz using high-resolution spectroscopy on molecular iodine. We show that optical spectra reflect the velocity distribution of expanding condensates in free fall or after release inside an optical waveguide. We demonstrate subkilohertz spectral linewidths, with long-term drifts of the resonance frequency well below 1 kHz/h. These results open the way to high-resolution spectroscopy of many-body systems.

  6. Diode-pumped 1028 nm Ytterbium-doped fiber laser with near 90% slope efficiency

    NASA Astrophysics Data System (ADS)

    Harun, S. W.; Paul, M. C.; Moghaddam, M. R. A.; Das, S.; Sen, R.; Dhar, A.; Pal, M.; Bhadra, S. K.; Ahmad, H.

    2010-03-01

    Highly efficient laser action from an Ytterbium-doped fiber (YDF) is demonstrated using a fiber Bragg grating (FBG) in conjunction with a 4% Fresnel reflection at room temperature. The YDF used is drawn from Yb2O3-doped preform, fabricated through deposition of porous layer of composition SiO2-GeO2 by the MCVD process in conjunction with a solution doping technique. The fabricated YDF has a core composition of 0.2 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2 with a pump absorption of 9.0 dB/m. The fiber laser operates at wavelength of 1028 nm with a slope efficiency of 88% with respect to the launched 976 nm pump power using the YDF length of 7 m.

  7. An ytterbium-doped fiber laser at 1.1 micron

    NASA Astrophysics Data System (ADS)

    Chaboyer, Zachary Jordan

    A pulsed ytterbium-doped fiber laser is proposed and developed. A length of samarium-doped fiber was inserted into the laser cavity to induce passive Q-switching. The laser oscillated in the continuous wave, Q-switched mode-locked or Q-switched regime depending on adjustment of the intracavity polarization controller and the pump power. Q-switched pulses with a pulse energy of ˜7.5 nJ and duration of ˜70 ns were obtained at a pump power of ˜1500 mW, corresponding to a peak output power of ˜106 mW at an average power of 2 mW. The low output power was attributed to the low coupling efficiency of pump radiation into the cavity and the high cavity losses. All results were obtained at room temperature.

  8. High-resolution photoassociation spectroscopy of ultracold ytterbium atoms by using the intercombination transition.

    PubMed

    Tojo, Satoshi; Kitagawa, Masaaki; Enomoto, Katsunari; Kato, Yutaka; Takasu, Yosuke; Kumakura, Mitsutaka; Takahashi, Yoshiro

    2006-04-21

    We observed high-resolution photoassociation spectra of laser-cooled ytterbium (Yb) atoms in the spin-forbidden 1S0 - 3P1 intercombination line. The rovibrational levels in the 0u+ state were measured for red detunings of the photoassociation laser ranging from 2.9 MHz to 1.97 GHz with respect to the atomic resonance. The rotational splitting of the vibrational levels near the dissociation limit were fully resolved due to the sub-MHz linewidth of the spectra in contrast to previous measurements using the spin-allowed singlet transition. In addition, from a comparison between the spectra of 174Yb and those of 176Yb, a d-wave shape resonance for 174Yb is strongly suggested. PMID:16712155

  9. Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

    SciTech Connect

    Duchez, Jean-Bernard Mady, Franck Mebrouk, Yasmine Benabdesselam, Mourad

    2014-10-21

    We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding)

  10. The dawn of computer-assisted robotic osteotomy with ytterbium-doped fiber laser.

    PubMed

    Sotsuka, Yohei; Nishimoto, Soh; Tsumano, Tomoko; Kawai, Kenichiro; Ishise, Hisako; Kakibuchi, Masao; Shimokita, Ryo; Yamauchi, Taisuke; Okihara, Shin-ichiro

    2014-05-01

    Currently, laser radiation is used routinely in medical applications. For infrared lasers, bone ablation and the healing process have been reported, but no laser systems are established and applied in clinical bone surgery. Furthermore, industrial laser applications utilize computer and robot assistance; medical laser radiations are still mostly conducted manually nowadays. The purpose of this study was to compare the histological appearance of bone ablation and healing response in rabbit radial bone osteotomy created by surgical saw and ytterbium-doped fiber laser controlled by a computer with use of nitrogen surface cooling spray. An Ytterbium (Yb)-doped fiber laser at a wavelength of 1,070 nm was guided by a computer-aided robotic system, with a spot size of 100 μm at a distance of approximately 80 mm from the surface. The output power of the laser was 60 W at the scanning speed of 20 mm/s scan using continuous wave system with nitrogen spray level 0.5 MPa (energy density, 3.8 × 10(4) W/cm(2)). Rabbits radial bone osteotomy was performed by an Yb-doped fiber laser and a surgical saw. Additionally, histological analyses of the osteotomy site were performed on day 0 and day 21. Yb-doped fiber laser osteotomy revealed a remarkable cutting efficiency. There were little signs of tissue damage to the muscle. Lased specimens have shown no delayed healing compared with the saw osteotomies. Computer-assisted robotic osteotomy with Yb-doped fiber laser was able to perform. In rabbit model, laser-induced osteotomy defects, compared to those by surgical saw, exhibited no delayed healing response. PMID:24241973

  11. Nonlinear dynamics of Ytterbium-doped fiber laser Q-switched using acousto-optical modulator

    NASA Astrophysics Data System (ADS)

    Barmenkov, Y. O.; Kir'yanov, A. V.; Andres, M. V.

    2014-12-01

    A comprehensive experimental analysis of the dynamics of an ytterbium-doped fiber laser actively Q-switched (QS) using an intracavity acousto-optical modulator (AOM) is presented. It is shown that type of QS pulsing strongly depends on AOM repetition rate and pump power. In particular, at low repetition rates, including zero-rate, and at relatively high pump powers peculiar QS pulsing, switched by stimulated Brillouin scattering (SBS), is established in the laser. The cause of such kind of pulsing is the SBS-process boosted by spurious narrow-line CW lasing that arises in auxiliary low-Q cavity formed by an output coupler (in our experiments - fiber Bragg gratings) and weak reflections from blocked AOM. The parameters' area where this regime occurs is limited by certain values of pump power and AOM repetition rate. At increasing AOM repetition rate or decreasing pump power spurious CW lasing is not attained in the system; consequently, the SBS type of QS fades, while "conventional" QS (CQS) lasing is established in the system and remains. However CQS pulsing strongly suffers the nonlinear-dynamics effects: depending on AOM repetition rate and pump power the laser switches to common P1, P2, or P3 attractors, when QS pulses arise at sub-harmonics of AOM repetition rate, or to the specific transient regimes between them, or to chaotic operation. These and other sides (e.g. pulse jittering) of operation of the QS ytterbium-doped fiber laser with AOM are under scope of the present review as they have big interest for practical applications.

  12. Single-frequency ytterbium-doped fiber laser at 976 nm

    NASA Astrophysics Data System (ADS)

    Zhu, X.; Shi, W.; Zong, J.; Nguyen, D.; Norwood, R. A.; Chavez-Pirson, A.; Peyghambarian, N.

    2013-02-01

    Linearly polarized wavelength stable single frequency ytterbium (Yb3+) doped fiber lasers below 1 μm, namely threelevel Yb3+ fiber lasers, are highly demanded for nonlinear wavelength conversion to generate coherent blue light or even deep ultraviolet coherent sources. We present performance of a 976 nm single-frequency core-pumped distributed Bragg reflector (DBR) fiber laser consisting of a 2-cm long highly ytterbium-doped phosphate fiber and a pair of silica fiber Bragg gratings (FBGs) and their use for frequency doubling experiment. The high reflection (HR > 99%) and partial reflection (PR = 60%) FBGs were cleaved very close to the index modulation region and directly spliced to a 2-cm-long highly Yb3+-doped phosphate fiber. Over 100 mW of linearly polarized output with a linewidth less than 2 kHz can be obtained when the launched pump power is about 450 mW. The efficiency of the 976 nm single-frequency fiber laser (the output power vs the launched pump power) is about 25%. The relative intensity noise was measured to be -110 dB/Hz at 1 MHz and the variation of the center wavelength is less than 0.0005 nm during a measurement period of 2.5 hours. This single-frequency fiber laser has an SNR of over 50 dB and there is no strong ASE or spurious lasing at long wavelengths even at the maximum pump power. This all-fiber single-frequency DBR laser with attractive features can be used for efficient blue and UV generation through nonlinear frequency conversion. Moreover, this high-performance 976 nm single-frequency fiber laser can be used as a single-frequency, low RIN pump laser for long wavelength Yb3+-, Er3+-, or Yb3+/Er3+-doped fiber lasers and amplifiers.

  13. Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup

    SciTech Connect

    Doerscher, Soeren; Thobe, Alexander; Hundt, Bastian; Kochanke, Andre; Le Targat, Rodolphe; Windpassinger, Patrick; Becker, Christoph; Sengstock, Klaus

    2013-04-15

    We report on the first experimental setup based on a 2D-/3D-magneto-optical trap (MOT) scheme to create both Bose-Einstein condensates and degenerate Fermi gases of several ytterbium isotopes. Our setup does not require a Zeeman slower and offers the flexibility to simultaneously produce ultracold samples of other atomic species. Furthermore, the extraordinary optical access favors future experiments in optical lattices. A 2D-MOT on the strong {sup 1}S{sub 0}{yields}{sup 1}P{sub 1} transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow {sup 1}S{sub 0}{yields}{sup 3}P{sub 1} intercombination transition. Subsequently, atoms are transferred to a crossed optical dipole trap and cooled evaporatively to quantum degeneracy.

  14. Multi-pulses dynamic patterns in a topological insulator mode-locked ytterbium-doped fiber laser

    NASA Astrophysics Data System (ADS)

    Peiguang, Yan; Rongyong, Lin; Han, Zhang; Zhiteng, Wang; Han, Chen; Shuangchen, Ruan

    2015-01-01

    Multi-pulse dynamic patterns have been experimentally observed in an Ytterbium-doped fiber laser passively mode locked by a topological insulator (TI) Bi2Te3 saturable absorber (SA). The fundamental mode-locking operation with a repetition rate of ~1.10 MHz was achieved under a pump power of ~160 mW with an appropriate setting of the polarization controller (PC). It was found that through either changing the pump power or rotating the orientation of intra-cavity PC, several characteristic modes have been experimentally observed, including disordered multi-pulses, bunch of pulses, and soliton rains. Simultaneously, quasi-square pulses have also been observed in the laser cavity. Our systematic study clearly demonstrated that TI could be developed as an effective SA for the generation of different pulse operation states in a passively mode-locked all-normal-dispersion Ytterbium-doped fiber laser.

  15. Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup.

    PubMed

    Dörscher, Sören; Thobe, Alexander; Hundt, Bastian; Kochanke, André; Le Targat, Rodolphe; Windpassinger, Patrick; Becker, Christoph; Sengstock, Klaus

    2013-04-01

    We report on the first experimental setup based on a 2D-/3D-magneto-optical trap (MOT) scheme to create both Bose-Einstein condensates and degenerate Fermi gases of several ytterbium isotopes. Our setup does not require a Zeeman slower and offers the flexibility to simultaneously produce ultracold samples of other atomic species. Furthermore, the extraordinary optical access favors future experiments in optical lattices. A 2D-MOT on the strong (1)S0 → (1)P1 transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow (1)S0 → (3)P1 intercombination transition. Subsequently, atoms are transferred to a crossed optical dipole trap and cooled evaporatively to quantum degeneracy. PMID:23635183

  16. Charge-transfer state excitation as the main mechanism of the photodarkening process in ytterbium-doped aluminosilicate fibres

    SciTech Connect

    Bobkov, K K; Rybaltovsky, A A; Vel'miskin, V V; Likhachev, M E; Bubnov, M M; Dianov, E M; Umnikov, A A; Gur'yanov, A N; Vechkanov, N N; Shestakova, I A

    2014-12-31

    We have studied photodarkening in ytterbium-doped fibre preforms with an aluminosilicate glass core. Analysis of their absorption and luminescence spectra indicates the formation of stable Yb{sup 2+} ions in the glass network under IR laser pumping at a wavelength λ = 915 nm and under UV irradiation with an excimer laser (λ = 193 nm). We have performed comparative studies of the luminescence spectra of the preforms and crystals under excitation at a wavelength of 193 nm. The mechanism behind the formation of Yb{sup 2+} ions and aluminium – oxygen hole centres (Al-OHCs), common to ytterbium-doped YAG crystals and aluminosilicate glass, has been identified: photoinduced Yb{sup 3+} charge-transfer state excitation. (optical fibres)

  17. Investigation of the vapour-plasma plume in the welding of titanium by high-power ytterbium fibre laser radiation

    NASA Astrophysics Data System (ADS)

    Bykovskiy, D. P.; Petrovskii, V. N.; Uspenskiy, S. A.

    2015-03-01

    The vapour-plasma plume produced in the welding of 6-mm thick VT-23 titanium alloy plates by ytterbium fibre laser radiation of up to 10 kW power is studied in the protective Ar gas medium. High-speed video filming of the vapour-plasma plume is used to visualise the processes occurring during laser welding. The coefficient of inverse bremsstrahlung by the welding plasma plume is calculated from the data of the spectrometric study.

  18. Ytterbium-doped fibre laser tunable in the range 1017 - 1040 nm with second-harmonic generation

    SciTech Connect

    Dontsova, E I; Kablukov, S I; Babin, Sergei A

    2013-05-31

    A cladding-pumped ytterbium-doped fibre laser has been tuned to shorter emission wavelengths (from 1040 to 1017 nm). The laser output power obtained has been compared to calculation results. We have studied frequency doubling of the laser in a KTiOPO{sub 4} (KTP) crystal with type II phase matching in the XY plane and demonstrated wavelength tuning in the range 510 - 520 nm. (lasers)

  19. Spectroscopy of the forbidden 1S0 -->3P0 transition on ultra-cold ytterbium atoms

    NASA Astrophysics Data System (ADS)

    Dareau, Alexandre; Scholl, Matthias; Beaufils, Quentin; Döring, Daniel; Beugnon, Jérôme; Gerbier, Fabrice

    2015-05-01

    Cold atoms in optical lattices are often considered a rich playground for emulating condensed matter systems, since they make it possible to engineer many-body Hamiltonians with tunable parameters. However, one missing feature is the ability to emulate orbital magnetism. Recent proposals for simulating orbital magnetism with neutral atoms rely on a state-dependent optical lattice with laser-driven hopping. Ytterbium, with its long lived metastable state (3P0), is a well-suited candidate for the implementation of such schemes. Addressing the forbidden transition between ytterbium ground (1S0) and meta-stable (3P0) states is experimentally challenging, and requires the use of a laser with stability close to the standards of atomic clocks. I will report on the building of a ultra-narrow laser locked on a high-finesse low-expansion cavity. I will then show how the absolute frequency of the cavity modes can be calibrated by performing high-resolution spectroscopy on molecular iodine, allowing us perform Doppler spectroscopy on the 1S0 -->3P0 transition of an ytterbium BEC.

  20. Generation of white-light through frequency upconversion in praseodymium-ytterbium codoped nano-structured fluorogermanate glass

    NASA Astrophysics Data System (ADS)

    Gouveia-Neto, Artur S.; Rios, Nathalia P. S. M.; Bueno, Luciano A.

    2012-02-01

    Praseodymium-ytterbium codoped fluorogermanate nano-structured phosphors for solid-state lighting were synthesized by thermal treatment of precursor glasses. Room temperature luminescence features of praseodymium-ytterbium ions incorporated into low-phonon-energy PbF2 nanocrystals dispersed into the fluorogermanate glass matrix and excited with near-infrared light emitting diode laser was evaluated. The luminescence spectra exhibited predominant emissions in the 475-500, 520-530, and 600-650 nm regions. White-light emission was observed in ytterbium-sensitized praseodymiumdoped phosphor excited at 980 nm. The dependence of the luminescence emisson intensity upon annealing temperature, and rare-earth concentrations was also evaluated. The results indicated that there exist an optimum annealing temperature and activator ion concentration in order to obtain efficient upconversion emission signals with CIE 1946 chromaticity coordinates within the white-light borderline region. Results indicate that the nanocomposite fluorogermanate glassy phosphor is a promissing novel contender for application in white-light solid-state display technology

  1. Microstructure, toughness and flexural strength of self-reinforced silicon nitride ceramics doped with yttrium oxide and ytterbium oxide.

    PubMed

    Zheng, Y. S.; Knowles, K. M.; Vieira, J. M.; Lopes, A. B.; Oliveira, F. J.

    2001-02-01

    Self-reinforced silicon nitride ceramics with additions of either yttrium oxide or ytterbium oxide have been investigated at room temperature after various processing heat treatments. Devitrification of the intergranular phase in these materials is very sensitive to the heat treatment used during processing and does not necessarily improve their strength and toughness. Hot-pressed ceramics without a subsequent devitrification heat treatment were the strongest. The ytterbium oxide-doped silicon nitride ceramics were consistently tougher, but less strong, than the yttrium oxide-doped silicon nitride ceramics. In all the ceramics examined, the fracture toughness showed evidence for R-curve behaviour. This was most significant in pressureless sintered ytterbium oxide-doped silicon nitride ceramics. A number of toughening mechanisms, including crack deflection, bridging, and fibre-like grain pull-out, were observed during microstructural analysis of the ceramics. In common with other silicon nitride-based ceramics, thin amorphous films were found at the grain boundaries in each of the ceramics examined. Arrays of dislocations left in the elongated silicon nitride grains after processing were found to belong to the {101;0}<0001> primary slip system. PMID:11207926

  2. Development of trivalent ytterbium doped fluorapatites for diode-pumped laser applications

    NASA Astrophysics Data System (ADS)

    Bayramian, Andrew James

    2000-11-01

    A major motivator of this work is the Mercury Project, a one kilowatt diode-pumped solid-state laser system under development at Lawrence Livermore National Laboratory (LLNL), which incorporates ytterbium doped strontium fluorapatite, Sr5(PO4)3F (S-FAP), as the amplifier gain medium. The primary focus of this thesis is a full understanding of the properties of this material, which is necessary for proper design and modeling of the system. Ytterbium-doped fluorapatites were investigated at LLNL prior to this work and found to be ideal candidate materials for high-power amplifier systems providing high absorption and emission cross sections, long radiative lifetimes, and high efficiency. A family of barium substituted S-FAP crystals was grown in an effort to modify the pump and emission bandwidths for application to broadband diode pumping and short pulse generation. Crystals of Yb 3+:Srs5-xBax(PO4) 3F where x < 1 showed homogeneous lines offering 8.4 nm (1.8X enhancement) of absorption bandwidth and 6.9 nm (1.4X enhancement) of emission bandwidth. The gain saturation fluence of Yb:S-FAP was measured to be 3.2 J/cm 2 with homogeneous extraction using a pump-probe experiment where the probe laser was a high intensity Q-switched master oscillator power amplifier system. The crystal quality of Czochralski grown Yb:S-FAP boules, which is effected by defects such as cracking, cloudiness, bubble core, slip dislocations, and anomalous absorption, was investigated interferometrically and quantified by means of Power Spectral Density (PSD) plots. Stimulated Raman Scattering (SRS) losses were evaluated by first measuring the SRS gain coefficient to be 1.3 cm/GW, then modeling the losses in the Mercury amplifier system. Countermeasures including the addition of bandwidth to the extraction beam and wedging of amplifier surfaces are shown to reduce the SRS losses allowing efficient laser gain extraction at higher intensities. Finally, an efficient Q-switched Yb:S-FAP oscillator

  3. 26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Definition of soil and water conservation expenditures. 1.175-2 Section 1.175-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES Itemized Deductions for Individuals and Corporations (continued) § 1.175-2 Definition of soil...

  4. 26 CFR 1.175-7 - Allocation of expenditures in certain circumstances.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Allocation of expenditures in certain circumstances. 1.175-7 Section 1.175-7 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-7 Allocation...

  5. 27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... are unfit for beverage purposes and which are brought into the United States from Puerto Rico or the U... USED IN MANUFACTURING NONBEVERAGE PRODUCTS General Provisions § 17.5 Products manufactured in...

  6. 48 CFR 217.175 - Multiyear contracts for electricity from renewable energy sources.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... electricity from renewable energy sources. 217.175 Section 217.175 Federal Acquisition Regulations System... SPECIAL CONTRACTING METHODS Mulityear Contracting 217.175 Multiyear contracts for electricity from... not to exceed 10 years for the purchase of electricity from sources of renewable energy, as that...

  7. 30 CFR 250.175 - When may the Regional Supervisor grant an SOO?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 2 2013-07-01 2013-07-01 false When may the Regional Supervisor grant an SOO? 250.175 Section 250.175 Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF General Suspensions § 250.175 When may the...

  8. 24 CFR 990.175 - Utilities expense level: Computation of the current consumption level.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...: Computation of the current consumption level. 990.175 Section 990.175 Housing and Urban Development... Calculating Formula Expenses § 990.175 Utilities expense level: Computation of the current consumption level. The current consumption level shall be the actual amount of each utility consumed during the...

  9. 24 CFR 990.175 - Utilities expense level: Computation of the current consumption level.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...: Computation of the current consumption level. 990.175 Section 990.175 Housing and Urban Development... Calculating Formula Expenses § 990.175 Utilities expense level: Computation of the current consumption level. The current consumption level shall be the actual amount of each utility consumed during the...

  10. 24 CFR 990.175 - Utilities expense level: Computation of the current consumption level.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...: Computation of the current consumption level. 990.175 Section 990.175 Housing and Urban Development... Calculating Formula Expenses § 990.175 Utilities expense level: Computation of the current consumption level. The current consumption level shall be the actual amount of each utility consumed during the...

  11. 41 CFR 102-41.175 - May we sell unclaimed personal property?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 41 Public Contracts and Property Management 3 2010-07-01 2010-07-01 false May we sell unclaimed personal property? 102-41.175 Section 102-41.175 Public Contracts and Property Management Federal Property... § 102-41.175 May we sell unclaimed personal property? Yes, you may sell unclaimed personal...

  12. 50 CFR 300.175 - Hail-in and hail-out reports.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 50 Wildlife and Fisheries 11 2012-10-01 2012-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a)...

  13. 50 CFR 300.175 - Hail-in and hail-out reports.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 50 Wildlife and Fisheries 11 2014-10-01 2014-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a)...

  14. 50 CFR 300.175 - Hail-in and hail-out reports.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 50 Wildlife and Fisheries 9 2011-10-01 2011-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a)...

  15. 50 CFR 300.175 - Hail-in and hail-out reports.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a)...

  16. 50 CFR 300.175 - Hail-in and hail-out reports.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 50 Wildlife and Fisheries 11 2013-10-01 2013-10-01 false Hail-in and hail-out reports. 300.175 Section 300.175 Wildlife and Fisheries INTERNATIONAL FISHING AND RELATED ACTIVITIES INTERNATIONAL FISHERIES REGULATIONS Pacific Albacore Tuna Fisheries § 300.175 Hail-in and hail-out reports. (a)...

  17. 21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.260...

  18. 21 CFR 175.320 - Resinous and polymeric coatings for polyolefin films.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Resinous and polymeric coatings for polyolefin films. 175.320 Section 175.320 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.320...

  19. 20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of...

  20. 20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of...

  1. 20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of...

  2. 20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of...

  3. 20 CFR 220.175 - Responsibility to notify the Board of events which affect disability.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Responsibility to notify the Board of events which affect disability. 220.175 Section 220.175 Employees' Benefits RAILROAD RETIREMENT BOARD... Substantial Gainful Activity or Medical Improvement § 220.175 Responsibility to notify the Board of...

  4. 5 CFR 175.102 - Requests for the declassification of documents.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 1 2014-01-01 2014-01-01 false Requests for the declassification of documents. 175.102 Section 175.102 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS OPM MANDATORY REVIEW OF CLASSIFIED DOCUMENTS § 175.102 Requests for the declassification of documents. Any Federal agency,...

  5. 33 CFR 175.25 - Enforcement of State requirements for children to wear personal flotation devices.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Enforcement of State requirements for children to wear personal flotation devices. 175.25 Section 175.25 Navigation and Navigable Waters... Flotation Devices § 175.25 Enforcement of State requirements for children to wear personal flotation...

  6. Shape difference implied by quenched Coriolis interaction in 175Os

    NASA Astrophysics Data System (ADS)

    Dracoulis, G. D.; Fabricius, B.

    1990-06-01

    Chance near degeneracy of rotational states in the 1/2-[521] and 5/2-[512] bands in 175Os leads to mixing and connecting E2 transitions. Analysis of the observed branching ratios gives an interaction matrix element of about 4 keV, an order of magnitude smaller than the expected Coriolis interaction, deduced from particle-rotor calculations. A difference in deformation of 25% between the two configurations, as suggested by the larger unperturbed moment of inertia in the 1/2-[521] band, would explain the quenched interaction.

  7. Performance of organic photovoltaics using an ytterbium trifluoride n-type buffer layer

    NASA Astrophysics Data System (ADS)

    Ji, Chan Hyuk; Jang, Ji Min; Oh, Se Young

    2016-03-01

    Ytterbium trifluoride (YbF3) was used as an n-type cathode buffer layer in conventional poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PC60BM) bulk heterojunction (BHJ) organic photovoltaic cells. This buffer layer acts as an electron-transport layer and improves the open circuit voltage ( V oc), power conversion efficiency (PCE), and interfacial durability of the device. The physical properties and performance of the device were studied using impedance spectroscopy, photocurrent measurements, ultraviolet photoelectron spectroscopy, and atomic force microscopy. The PCE reached to 3.2% with a 65% fill factor under 1 sun irradiation. The PCE decreased to half of its original value after 120 h at room temperature in air or 24 h at 70°C in air. Comparison with Yb and TiOx cathode buffer layers reveals that YbF3 has superior performance and longevity. These findings suggest that YbF3 has the potential to replace costly device encapsulation. [Figure not available: see fulltext.

  8. Hydration of gas-phase ytterbium ion complexes studied by experiment and theory

    SciTech Connect

    Rutkowski, Philip X; Michelini, Maria C.; Bray, Travis H.; Russo, Nino; Marcalo, Joaquim; Gibson, John K.

    2011-02-11

    Hydration of ytterbium (III) halide/hydroxide ions produced by electrospray ionization was studied in a quadrupole ion trap mass spectrometer and by density functional theory (DFT). Gas-phase YbX{sub 2}{sup +} and YbX(OH){sup +} (X = OH, Cl, Br, or I) were found to coordinate from one to four water molecules, depending on the ion residence time in the trap. From the time dependence of the hydration steps, relative reaction rates were obtained. It was determined that the second hydration was faster than both the first and third hydrations, and the fourth hydration was the slowest; this ordering reflects a combination of insufficient degrees of freedom for cooling the hot monohydrate ion and decreasing binding energies with increasing hydration number. Hydration energetics and hydrate structures were computed using two approaches of DFT. The relativistic scalar ZORA approach was used with the PBE functional and all-electron TZ2P basis sets; the B3LYP functional was used with the Stuttgart relativistic small-core ANO/ECP basis sets. The parallel experimental and computational results illuminate fundamental aspects of hydration of f-element ion complexes. The experimental observations - kinetics and extent of hydration - are discussed in relationship to the computed structures and energetics of the hydrates. The absence of pentahydrates is in accord with the DFT results, which indicate that the lowest energy structures have the fifth water molecule in the second shell.

  9. Development of ytterbium-doped oxyfluoride glasses for laser cooling applications.

    PubMed

    Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

    2016-01-01

    Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb(3+)) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb(3+) concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb(3+): glass and decreases with increasing Yb(3+) concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm(3+) and Er(3+) ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb(3+): (2)F5/2 → (2)F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb(3+) with increasing Yb(3+) concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed. PMID:26915817

  10. Theoretical and experimental research of supercontinuum generation in an ytterbium-doped fiber amplifier.

    PubMed

    Lei, Chengmin; Jin, Aijun; Song, Rui; Chen, Zilun; Hou, Jing

    2016-05-01

    The theoretical research of supercontinuum (SC) generation in a fiber amplifier system has been seldom reported. For the purpose of further understanding the mechanism of SC generation in fiber amplifiers, we propose a combined numerical model of the laser rate equations and the generalized non-linear Schrödinger equation to simulate the amplification of 1060 nm picosecond pulses and their spectral broadening in an ytterbium-doped fiber amplifier. The calculation results of this model are compared with the experimental results under the same conditions and a good agreement is achieved. We find that the pulse is gain amplified initially, and then dominated by stimulated Raman scattering in the normal dispersion region. In anomalous dispersion region, modulation instability, higher-order soliton fission and soliton self-frequency shift dominates the spectral broadening. It is found numerically and experimentally that the length of the gain fiber and the 976 nm pump power are the most imperative parameters to control the output power, spectral range and flatness of the SC. The pulse width of signal pulse also plays a part in influencing SC generation. The results verify that our model is promising for analyzing the physical processes of pulse evolution and SC generation in a fiber amplifier system. PMID:27137540

  11. Synthesis and photocatalytic activity of ytterbium-doped titania/diatomite composite photocatalysts

    NASA Astrophysics Data System (ADS)

    Tang, Wenjian; Qiu, Kehui; Zhang, Peicong; Yuan, Xiqiang

    2016-01-01

    Ytterbium-doped titanium dioxide (Yb-TiO2)/diatomite composite materials with different Yb concentrations were prepared by sol-gel method. The phase structure, morphology, and chemical composition of the as-prepared composites were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and ultraviolet-visible (UV-vis) diffuse reflection spectroscopy. The XRD and Raman spectroscopy analysis indicated that the TiO2 existed in the form of pure anatase in the composites. The SEM images exhibited the well deposition and dispersion of TiO2 nanoparticles with little agglomeration on the surfaces of diatoms. The UV-vis diffuse reflection spectra showed that the band gap of TiO2 could be narrowed by the introduction of Yb species, which was further affected by doping concentration of Yb. The photocatalytic activity of synthesized samples was investigated by the degradation of methylene blue (MB) under UV light irradiation. It was observed that the photocatalytic degradation followed a pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Compared to TiO2 and TiO2/diatomite, the Yb-TiO2/diatomite composites exhibited higher photocatalytic activity toward degradation of MB using UV light irradiation.

  12. Scaling up the precision in a ytterbium Bose-Einstein condensate interferometer

    NASA Astrophysics Data System (ADS)

    McAlpine, Katherine; Plotkin-Swing, Benjamin; Gochnauer, Daniel; Saxberg, Brendan; Gupta, Subhadeep

    2016-05-01

    We report on progress toward a high-precision ytterbium (Yb) Bose-Einstein condensate (BEC) interferometer, with the goal of measuring h/m and thus the fine structure constant α. Here h is Planck's constant and m is the mass of a Yb atom. The use of the non-magnetic Yb atom makes our experiment insensitive to magnetic field noise. Our chosen symmetric 3-path interferometer geometry suppresses errors from vibration, rotation, and acceleration. The precision scales with the phase accrued due to the kinetic energy difference between the interferometer arms, resulting in a quadratic sensitivity to the momentum difference. We are installing and testing the laser pulses for large momentum transfer via Bloch oscillations. We will report on Yb BEC production in a new apparatus and progress toward realizing the atom optical elements for high precision measurements. We will also discuss approaches to mitigate two important systematics: (i) atom interaction effects can be suppressed by creating the BEC in a dynamically shaped optical trap to reduce the density; (ii) diffraction phase effects from the various atom-optical elements can be accounted for through an analysis of the light-atom interaction for each pulse.

  13. CsPbBr3 nanocrystal saturable absorber for mode-locking ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Zhou, Yan; Hu, Zhiping; Li, Yue; Xu, Jianqiu; Tang, Xiaosheng; Tang, Yulong

    2016-06-01

    Cesium lead halide perovskite nanocrystals (CsPbX3, X = Cl, Br, I) have been reported as efficient light-harvesting and light-emitting semiconductor materials, but their nonlinear optical properties have been seldom touched upon. In this paper, we prepare layered CsPbBr3 nanocrystal films and characterize their physical properties. Broadband linear absorption from ˜0.8 to over 2.2 μm and nonlinear optical absorption at the 1-μm wavelength region are measured. The CsPbBr3 saturable absorber (SA), manufactured by drop-casting of colloidal CsPbBr3 liquid solution on a gold mirror, shows modulation depth and saturation intensity of 13.1% and 10.7 MW/cm2, respectively. With this SA, mode-locking operation of a polarization-maintained ytterbium fiber laser produces single pulses with duration of ˜216 ps, maximum average output power of 10.5 mW, and the laser spectrum is centered at ˜1076 nm. This work shows that CsPbBr3 films can be efficient SA candidates for fiber lasers and also have great potential to become broadband linear and nonlinear optical materials for photonics and optoelectronics.

  14. Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre

    NASA Astrophysics Data System (ADS)

    Daniel, Jae M. O.; Simakov, Nikita; Hemming, Alexander; Clarkson, W. Andrew; Haub, John

    2016-03-01

    We present a novel metal coated triple clad active fibre design, utilising an all glass inner cladding structure and aluminium outer coating. This metal coated active fibre enables a number of benefits to high power laser design, such as increase robustness and extended operating temperature range. As a demonstration of the advantages of this design a passively cooled ytterbium fibre laser is presented. A 20 m length of active fibre was coiled into a planar arrangement and mounted onto a high emissivity heatsink. Up to 405 W of output power was achieved without the need for active water or forced air cooling. The slope efficiency of this source was 74 % and maximum outer heat sink temperature was ~140°C. This arrangement allowed for significant weight and size savings to be achieved with the active fibre laser head weighing less than 100 g. We will discuss the design choices and trade-offs of metal coated active fibre on high power fibre laser systems as well as the prospects for further power scaling to the kW level.

  15. Double-clad erbium/ytterbium-doped fiber laser with a fiber Bragg grating

    NASA Astrophysics Data System (ADS)

    Moghaddam, M. R. A.; Harun, S. W.; Tamjis, M. R.; Ahmad, H.

    2009-08-01

    A double-clad erbium/ytterbium-doped fiber laser (EYDFL) is demonstrated using a fiber Bragg grating (FBG) as wavelength selective filter in a linear cavity resonator. The effect of the FBG's wavelength on the performance of the EYDFL is also investigated. The slope efficiencies of the EYDFL are obtained at 33.7%, 30.9%, and 24.1% for the operating wavelengths of 1553.6, 1557.3, and 1562.8 nm, respectively. The efficiency is higher with a shorter wavelength due to the amplification characteristic of the EYDF which peaks at 1545 nm. At FBG's wavelength of 1553.6 nm, the EYDFL has an output power of 520 mW when pumped at 1700 mW by a 937 nm laser diode. The laser also has a spectral bandwidth of 0.2 nm and signal to noise ratio of more than 25 dB. The threshold power to achieve lasing is measured to be approximately 90 mW for this laser.

  16. Coqblin-Schrieffer model for an ultracold gas of ytterbium atoms with metastable state

    NASA Astrophysics Data System (ADS)

    Kuzmenko, Igor; Kuzmenko, Tetyana; Avishai, Yshai; Jo, Gyu-Boong

    2016-03-01

    Motivated by the impressive recent advance in manipulating cold ytterbium atoms, we explore and substantiate the feasibility of realizing the Coqblin-Schrieffer model in a gas of cold fermionic 173Yb atoms. Making use of different AC polarizabillity of the electronic ground state (electronic configuration S10) and the long lived metastable state (electronic configuration P30), it is substantiated that the latter can be localized and serve as a magnetic impurity while the former remains itinerant. The exchange mechanism between the itinerant S10 and the localized P30 atoms is analyzed and shown to be antiferromagnetic. The ensuing SU(6) symmetric Coqblin-Schrieffer Hamiltonian is constructed, and, using the calculated exchange constant J , perturbative renormalization group (RG) analysis yields the Kondo temperature TK that is experimentally accessible. A number of thermodynamic measurable observables are calculated in the weak-coupling regime T >TK (using perturbative RG analysis) and in the strong-coupling regime T

  17. Laser system for Doppler cooling of ytterbium ion in an optical frequency standard

    SciTech Connect

    Chepurov, S V; Lugovoy, A A; Kuznetsov, S N

    2014-06-30

    A laser system for Doppler cooling of ytterbium ion on the {sup 2}S{sub 1/2} → {sup 2}P{sub 1/2} transition in a single-ion optical frequency standard is developed. The second harmonic of a semiconductor laser with a wavelength of 739 nm is used for cooling. The laser frequency is doubled in a nonlinear BiBO crystal embedded in a ring resonator, which also serves as a reference for laser frequency stabilisation. Second-harmonic power of ∼100 μW is generated at a wavelength of 369.5 nm. Diode laser radiation is modulated by an electro-optic modulator at 14.75 GHz to generate a sideband exciting the {sup 2}S{sub 1/2} (F = 0) → {sup 2}P{sub 1/2} (F = 1) hyperfine component of the cooling transition that is not excited by resonant cooling light. The sideband relative intensity of a few percent proved to be sufficient to reduce the ion dwelling time in the {sup 2}S{sub 1/2} (F = 0) state to less than 10{sup -4} s and increase the cooling efficiency. (extreme light fields and their applications)

  18. Digital-wavelength ytterbium fiber laser mode-locked with MoS2

    NASA Astrophysics Data System (ADS)

    Wang, Shiwei; Zhou, Yan; Wang, Yao; Yan, Shuo; Li, Yue; Zheng, Wanguo; Deng, Ying; Zhu, Qihua; Xu, Jianqiu; Tang, Yulong

    2016-05-01

    In this letter, we report a digital-wavelength ytterbium-doped fiber laser passively mode-locked with layered molybdenum disulfide (MoS2). The MoS2 based saturable absorber (SA) is made by solution coating the MoS2 solution on a gold mirror, showing modulation depth and saturation intensity of 11.4% and 1.37 MW cm‑2, respectively. The output pulse has duration of ~300 ps, 3 dB spectral width of ~0.5 nm and maximum output power of 2.6 mW. The mode-locked fundamental frequency is 2.67 MHz with a ~36 dB signal-to-noise ratio. Through tuning the polarization controller (PC) and squeezing/stretching the single mode fiber in the ring cavity, four-bit digital wavelength emission is achieved. It is proposed that the digital-wavelength tuning feature of fiber lasers can be employed in coding and signal processing.

  19. Development of ytterbium-doped oxyfluoride glasses for laser cooling applications

    PubMed Central

    Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

    2016-01-01

    Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb3+) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb3+ concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb3+: glass and decreases with increasing Yb3+ concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm3+ and Er3+ ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb3+: 2F5/2 → 2F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb3+ with increasing Yb3+ concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed. PMID:26915817

  20. Spectral diagnostics of a vapor-plasma plume produced during welding titanium with a high-power ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Uspenskiy, S. A.; Petrovskiy, V. N.; Bykovskiy, D. P.; Mironov, V. D.; Prokopova, N. M.; Tret'yakov, E. V.

    2015-03-01

    This work is devoted to the research of welding plume during high power ytterbium fiber laser welding of a titanium alloy in the Ar shielding gas environment. High speed video observation of a vapor-plasma plume for visualization of processes occurring at laser welding was carried out. The coefficient of the inverse Bremsstrahlung absorption of laser radiation is calculated for a plasma welding plume by results of spectrometer researches. The conclusion deals with the impact of plasma on a high-power fiber laser radiation.

  1. Parameters for the RM1 Quantum Chemical Calculation of Complexes of the Trications of Thulium, Ytterbium and Lutetium

    PubMed Central

    Filho, Manoel A. M.; Dutra, José Diogo L.; Rocha, Gerd B.; Simas, Alfredo M.

    2016-01-01

    The RM1 quantum chemical model for the calculation of complexes of Tm(III), Yb(III) and Lu(III) is advanced. Subsequently, we tested the models by fully optimizing the geometries of 126 complexes. We then compared the optimized structures with known crystallographic ones from the Cambridge Structural Database. Results indicate that, for thulium complexes, the accuracy in terms of the distances between the lanthanide ion and its directly coordinated atoms is about 2%. Corresponding results for ytterbium and lutetium are both 3%, levels of accuracy useful for the design of lanthanide complexes, targeting their countless applications. PMID:27223475

  2. Different pulse pattern generation by frequency detuning in pulse modulated actively mode-locked ytterbium doped fiber laser

    NASA Astrophysics Data System (ADS)

    Chen, He; Chen, Sheng-Ping; Si, Lei; Zhang, Bin; Jiang, Zong-Fu

    2015-10-01

    We report the results of our recent experimental investigation of the modulation frequency detuning effect on the output pulse dynamics in a pulse modulated actively mode-locked ytterbium doped fiber laser. The experimental study shows the existence of five different mode-locking states that mainly depend on the modulation frequency detuning, which are: (a) amplitude-even harmonic/fundamental mode-locking, (b) Q-switched harmonic/fundamental mode-locking, (c) sinusoidal wave modulation mode, (d) pulses bundle state, and (e) noise-like state. A detailed experimental characterization of the output pulses dynamics in each operating mode is presented.

  3. Thulium(III) and ytterbium(III) in aqueous solution ab initio quantum mechanical charge field molecular dynamics studies

    NASA Astrophysics Data System (ADS)

    Passler, Peter P.; Rode, Bernd M.

    2015-10-01

    Hydration properties of trivalent thulium and ytterbium ions in aqueous solution are investigated via quantum mechanical charge field molecular dynamics (QMCF-MD) simulations. The QMCF-MD formalism is a special type of QM/MM simulation, where the chemically most relevant part of the system - in this case the ion with its first and second hydration shells - is treated by quantum mechanics. The mean ionsbnd O distances and the average coordination numbers of the first hydration shells are compared with experimental EXAFS data. Mean ligand residence times, vibrational frequencies and force constants were evaluated to characterise the dynamics of the systems.

  4. Detection of precise quantum defects of the 6snd, 6sng and 6sni Rydberg states of Ytterbium

    NASA Astrophysics Data System (ADS)

    Niyaz, Fathima; Nunkaew, Jirakan; Gallagher, Thomas

    2016-05-01

    We use a selective field ionization technique to observe the microwave transitions of Ytterbium Rydberg states, from the 6s(n + 3)d states to the 6sng and 6snh states for 27 <= n <= 33. We also observe the microwave transitions from 6snd to 6s(n + 1)d for states 33 <= n <= 38. Our measurements and previous 6snd to 6s(n + 1)d measurements give precise values for the 6snd quantum defects which indicate the presence of a previously undetected perturbation in the series. This work has been supported by the U. S. Department of Energy, Office of Basic Energy Sciences.

  5. Note: Broadly tunable all-fiber ytterbium laser with 0.05 nm spectral width based on multimode interference filter

    SciTech Connect

    Mukhopadhyay, Pranab K. Gupta, Pradeep K.; Singh, Amarjeet; Sharma, Sunil K.; Bindra, Kushvinder S.; Oak, Shrikant M.

    2014-05-15

    A multimode interference filter with narrow transmission bandwidth and large self-imaging wavelength interval is constructed and implemented in an ytterbium doped fiber laser in all-fiber format for broad wavelength tunability as well as narrow spectral width of the output beam. The peak transmission wavelength of the multimode interference filter was tuned with the help of a standard in-fiber polarization controller. With this simple mechanism more than 30 nm (1038 nm–1070 nm) tuning range is demonstrated. The spectral width of the output beam from the laser was measured to be 0.05 nm.

  6. Parameters for the RM1 Quantum Chemical Calculation of Complexes of the Trications of Thulium, Ytterbium and Lutetium.

    PubMed

    Filho, Manoel A M; Dutra, José Diogo L; Rocha, Gerd B; Simas, Alfredo M; Freire, Ricardo O

    2016-01-01

    The RM1 quantum chemical model for the calculation of complexes of Tm(III), Yb(III) and Lu(III) is advanced. Subsequently, we tested the models by fully optimizing the geometries of 126 complexes. We then compared the optimized structures with known crystallographic ones from the Cambridge Structural Database. Results indicate that, for thulium complexes, the accuracy in terms of the distances between the lanthanide ion and its directly coordinated atoms is about 2%. Corresponding results for ytterbium and lutetium are both 3%, levels of accuracy useful for the design of lanthanide complexes, targeting their countless applications. PMID:27223475

  7. Development of Trivalent Ytterbium Doped Fluorapatites for Diode-Pumped Laser Applications

    SciTech Connect

    Bayramian, A.J.

    2000-06-21

    One of the major motivators of this work is the Mercury Project, which is a 1 kW scalable diode-pumped solid-state laser system under development at Lawrence Livermore National Laboratory (LLNL). Major goals include 100 J pulses, 10% wallplug efficiency, 10 Hz repetition rate, and a 5 times diffraction limited beam. To achieve these goals the Mercury laser incorporates ytterbium doped Sr{sub 5}(PO{sub 4}){sub 3}F (S-FAP) as the amplifier gain medium. The primary focus of this thesis is a full understanding of the properties of this material which are necessary for proper design and modeling of the system. Ytterbium doped fluorapatites, which were previously investigated at LLNL, were found to be ideal candidate materials for a high power amplifier systems providing high absorption and emission cross sections, long radiative lifetimes, and high efficiency. A family of barium substituted S-FAP crystals were grown in an effort to modify the pump and emission bandwidths for application to broadband diode pumping and short pulse generation. Crystals of Yb{sup 3+}:Sr{sub 5-x}Ba{sub x}(PO{sub 4}){sub 3}F where x < 1 showed homogeneous lines offering 8.4 nm (1.8 times enhancement) of absorption bandwidth and 6.9 nm (1.4 times enhancement) of emission bandwidth. The gain saturation fluence of Yb:S-FAP was measured to be 3.2 J/cm{sup 2} using a pump-probe experiment where the probe laser was a high intensity Q-switched master oscillator power amplifier system. The extraction data was successfully fit to a homogeneous extraction model. The crystal quality of Czochralski grown Yb:S-FAP crystals, which have been plagued by many defects such as cracking, cloudiness, bubble core, slip dislocations, and anomalous absorption, was investigated interferometrically and quantified by means of Power Spectral Density (PSD) plots. The very best crystals grown to date were found to have adequate crystal quality for use in the Mercury laser system. In addition to phase distortions which are

  8. KNb1.75V0.25PS10

    PubMed Central

    Yu, Jaemin; Yun, Hoseop

    2011-01-01

    The title compound, potassium diniobium vanadium phospho­rus deca­sulfide, KNb1.75V0.25PS10, was obtained by reaction of the elements with a eutectic mixture of KCl/LiCl. It is isostructural with the quaternary KNb2PS10, but the Nb sites are occupied by statistically disordered Nb (87.5%) and V (12.5%) atoms. The structure is composed of anionic ∞ 1[M 2PS10]− chains (M = Nb/V) separated from each other by K+ ions. The chain is composed of [MS8] distorted bicapped trigonal prisms and [PS4] tetra­hedra. There are no inter­chain bonding inter­actions. The crystal used for the X-ray analysis was a racemic twin. PMID:21522232

  9. Ultracold Mixtures of Rubidium and Ytterbium for Open Quantum System Engineering

    NASA Astrophysics Data System (ADS)

    Herold, Creston David

    Exquisite experimental control of quantum systems has led to sharp growth of basic quantum research in recent years. Controlling dissipation has been crucial in producing ultracold, trapped atomic samples. Recent theoretical work has suggested dissipation can be a useful tool for quantum state preparation. Controlling not only how a system interacts with a reservoir, but the ability to engineer the reservoir itself would be a powerful platform for open quantum system research. Toward this end, we have constructed an apparatus to study ultracold mixtures of rubidium (Rb) and ytterbium (Yb). We have developed a Rb-blind optical lattice at 423.018(7) nm, which will enable us to immerse a lattice of Yb atoms (the system) into a Rb BEC (superfluid reservoir). We have produced Bose-Einstein condensates of 170Yb and 174Yb, two of the five bosonic isotopes of Yb, which also has two fermionic isotopes. Flexible optical trapping of Rb and Yb was achieved with a two-color dipole trap of 532 and 1064 nm, and we observed thermalization in ultracold mixtures of Rb and Yb. Using the Rb-blind optical lattice, we measured very small light shifts of 87Rb BECs near the light shift zero-wavelengths adjacent the 6p electronic states, through a coherent series of lattice pulses. The positions of the zero-wavelengths are sensitive to the electric dipole matrix elements between the 5s and 6p states, and we made the first experimental measurement of their strength. By measuring a light shift, we were not sensitive to excited state branching ratios, and we achieved a precision better than 0.3%.

  10. The [18.1], [18.6] and [18.7] Excited States of Ytterbium Fluoride

    NASA Astrophysics Data System (ADS)

    Steimle, Timothy; Wang, Fang; Smallman, Joe

    2014-06-01

    The generation of a fountain of laser-cooled ytterbium fluoride, YbF, has been recently proposed as a method for long coherent observation times, thereby improving the electron electric dipole moment (eEDM) measurement. Understanding the properties of the excited electronic states of YbF is essential for the development of such a scheme for laser cooling. Here we report on the measurement of the radiative lifetimes,τ, permanent electric dipole moments, μel, and magnetic g-factors for the [18.6] and [18.7] excited states of YbF. The results are compared with the previously determined values for [18.1] state. The [18.1] state is the Ω=1/2 spin-orbit component of the A 2Π(v=0) electronic state arising from the Yb+(4f146pπ)F-(2p14) configuration. The experimentally determined μel, and g-factors will be used to unravel the nature of the [18.6] and [18.7] states, which are known to be admixtures A 2Π and an additional Ω=1/2 state of unknown electronic configuration. Tarbutt, M R; Sauer, B E; Hudson, J J; Hinds E A, New J. Phys 15, 053034, 2013. Zhuang,X; Le,A.;Steimle, T C; Bulleid, N E; Smallman, I J; Hendricks, R J; Skoff, S M ; M R; Hudson, J J; Sauer, B E; Hinds, Tarbutt, M R, PCCP, 13 19103, 2011 Condylis,P C; Hudson, J J; Tarbutt, M R; Sauer, B E; Hinds E A, J. Chem. Phys. 123, 231101, 2005

  11. 26 CFR 1.175-4 - Definition of “land used in farming.”

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of âland used in farming.â 1.175-4 Section 1.175-4 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-4 Definition of “land used...

  12. 26 CFR 1.175-3 - Definition of “the business of farming.”

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of âthe business of farming.â 1.175-3... (continued) § 1.175-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business...

  13. Indirect Production of No Carrier Added (NCA) (177)Lu from Irradiation of Enriched (176)Yb: Options for Ytterbium/Lutetium Separation.

    PubMed

    Dash, Ashutosh; Chakravarty, Rubel; Knapp, Furn F Russ; Pillai, Ambikalmajan M R

    2015-01-01

    This article presents a concise review of the production of no-carrier-added (NCA) (177)Lu by the 'indirect' route by irradiating ytterbium-176 ((176)Yb)-enriched targets. The success of this production method depends on the ability to separate the microscopic amounts of NCA (177)Lu from bulk irradiated ytterbium targets. The presence of Yb(+3) from the target in the final processed (177)Lu will adversely affect the quality of (177)Lu by decreasing the specific activity and competing with Lu(+3) complexation since ytterbium will follow the same coordination chemistry. Ytterbium and lutetium are adjacent members of the lanthanide family with very similar chemical properties which makes the separation of one from the other a challenging task. This review provides a summary of the methods developed for the separation and purification of NCA (177)Lu from neutron irradiated (176)Yb-enriched targets, a critical assessment of recent developments and a discussion of the current status of this (177)Lu production method. PMID:25771377

  14. Solid oxide membrane (SOM) process for ytterbium and silicon production from their oxides

    NASA Astrophysics Data System (ADS)

    Jiang, Yihong

    The Solid oxide membrane (SOM) electrolysis is an innovative green technology that produces technologically important metals directly from their respective oxides. A yttria-stabilized zirconia (YSZ) tube, closed at one end is employed to separate the molten salt containing dissolved metal oxides from the anode inside the YSZ tube. When the applied electric potential between the cathode in the molten salt and the anode exceeds the dissociation potential of the desired metal oxides, oxygen ions in the molten salt migrate through the YSZ membrane and are oxidized at the anode while the dissolved metal cations in the flux are reduced to the desired metal at the cathode. Compared with existing metal production processes, the SOM process has many advantages such as one unit operation, less energy consumption, lower capital costs and zero carbon emission. Successful implementation of the SOM electrolysis process would provide a way to mitigate the negative environmental impact of the metal industry. Successful demonstration of producing ytterbium (Yb) and silicon (Si) directly from their respective oxides utilizing the SOM electrolysis process is presented in this dissertation. During the SOM electrolysis process, Yb2O3 was reduced to Yb metal on an inert cathode. The melting point of the supporting electrolyte (LiF-YbF3-Yb2O3) was determined by differential thermal analysis (DTA). Static stability testing confirmed that the YSZ tube was stable with the flux at operating temperature. Yb metal deposit on the cathode was confirmed by scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). During the SOM electrolysis process for silicon production, a fluoride based flux based on BaF2, MgF2, and YF3 was engineered to serve as the liquid electrolyte for dissolving silicon dioxide. YSZ tube was used to separate the molten salt from an anode current collector in the liquid silver. Liquid tin was chosen as cathode to dissolve the reduced silicon during

  15. High Intensity Mirror-Free Nanosecond Ytterbium Fiber Laser System in Master Oscillator Power Amplification

    NASA Astrophysics Data System (ADS)

    Chun-Lin, Louis Chang

    Rare-earth-doped fiber lasers and amplifiers are relatively easy to efficiently produce a stable and high quality laser beam in a compact, robust, and alignment-free configuration. Recently, high power fiber laser systems have facilitated wide spread applications in academics, industries, and militaries in replacement of bulk solid-state laser systems. The master oscillator power amplifier (MOPA) composed of a highly-controlled seed, high-gain preamplifiers, and high-efficiency power amplifiers are typically utilized to scale up the pulse energy, peak power, or average power. Furthermore, a direct-current-modulated nanosecond diode laser in single transverse mode can simply provide a compact and highly-controlled seed to result in the flexible output parameters, such as repetition rate, pulse duration, and even temporal pulse shape. However, when scaling up the peak power for high intensity applications, such a versatile diode-seeded nanosecond MOPA laser system using rare-earth-doped fibers is unable to completely save its own advantages compared to bulk laser systems. Without a strong seeding among the amplifiers, the guided amplified spontaneous amplification is easy to become dominant during the amplification, leading to the harmful self-lasing or pulsing effects, and the difficulty of the quantitative numerical comparison. In this dissertation, we study a high-efficiency and intense nanosecond ytterbium fiber MOPA system with good beam quality and stability for high intensity applications. The all-PM-fiber structure is achieved with the output extinction ratio of >12 dB by optimizing the interconnection of high power optical fibers. The diode-seeded MOPA configuration without parasitic stimulated amplification (PAS) is implemented using the double-pass scheme to extract energy efficiently for scaling peak power. The broadband PAS was studied experimentally, which matches well with our numerical simulation. The 1064-nm nanosecond seed was a direct

  16. 7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 15 2012-01-01 2012-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL BUSINESS-COOPERATIVE SERVICE AND RURAL UTILITIES SERVICE, DEPARTMENT OF...

  17. 7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 15 2014-01-01 2014-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL BUSINESS-COOPERATIVE SERVICE AND RURAL UTILITIES SERVICE, DEPARTMENT OF...

  18. 7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 15 2013-01-01 2013-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL BUSINESS-COOPERATIVE SERVICE AND RURAL UTILITIES SERVICE, DEPARTMENT OF...

  19. 7 CFR 4279.175 - Domestic lamb industry adjustment assistance program set aside.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 15 2011-01-01 2011-01-01 false Domestic lamb industry adjustment assistance program set aside. 4279.175 Section 4279.175 Agriculture Regulations of the Department of Agriculture (Continued) RURAL BUSINESS-COOPERATIVE SERVICE AND RURAL UTILITIES SERVICE, DEPARTMENT OF...

  20. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  1. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  2. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  3. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  4. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  5. 49 CFR 175.25 - Notification at air passenger facilities of hazardous materials restrictions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Notification at air passenger facilities of hazardous materials restrictions. 175.25 Section 175.25 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION...

  6. 21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Zinc-silicon dioxide matrix coatings. 175.390... COATINGS Substances for Use as Components of Coatings § 175.390 Zinc-silicon dioxide matrix coatings. Zinc-silicon dioxide matrix coatings may be safely used as the food-contact surface of articles intended...

  7. 21 CFR 175.230 - Hot-melt strippable food coatings.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Hot-melt strippable food coatings. 175.230 Section... COATINGS Substances for Use as Components of Coatings § 175.230 Hot-melt strippable food coatings. Hot-melt strippable food coatings may be safely applied to food, subject to the provisions of this section. (a)...

  8. 27 CFR 17.5 - Products manufactured in Puerto Rico or the Virgin Islands.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Puerto Rico or the Virgin Islands. 17.5 Section 17.5 Alcohol, Tobacco Products and Firearms ALCOHOL AND... Rico or the Virgin Islands. For additional provisions regarding drawback on distilled spirits contained....S. Virgin Islands, see part 26, subparts I and Ob, of this chapter....

  9. 49 CFR 192.175 - Pipe-type and bottle-type holders.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 3 2011-10-01 2011-10-01 false Pipe-type and bottle-type holders. 192.175 Section....175 Pipe-type and bottle-type holders. (a) Each pipe-type and bottle-type holder must be designed so... or bottle-type holder must have minimum clearance from other holders in accordance with the...

  10. 49 CFR 192.175 - Pipe-type and bottle-type holders.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Pipe-type and bottle-type holders. 192.175 Section....175 Pipe-type and bottle-type holders. (a) Each pipe-type and bottle-type holder must be designed so... or bottle-type holder must have minimum clearance from other holders in accordance with the...

  11. 21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Zinc-silicon dioxide matrix coatings. 175.390... COATINGS Substances for Use as Components of Coatings § 175.390 Zinc-silicon dioxide matrix coatings. Zinc... water washing. Silica gel Sodium silicate Zinc, as particulate metal (d) The coating in the...

  12. 21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Zinc-silicon dioxide matrix coatings. 175.390... COATINGS Substances for Use as Components of Coatings § 175.390 Zinc-silicon dioxide matrix coatings. Zinc... water washing. Silica gel Sodium silicate Zinc, as particulate metal (d) The coating in the...

  13. 21 CFR 175.390 - Zinc-silicon dioxide matrix coatings.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Zinc-silicon dioxide matrix coatings. 175.390... Coatings § 175.390 Zinc-silicon dioxide matrix coatings. Zinc-silicon dioxide matrix coatings may be safely...-base indicator. Potassium dichromate Removed by water washing. Silica gel Sodium silicate Zinc,...

  14. 10 CFR 431.175 - Additional requirements applicable to non-Voluntary Independent Certification Program participants.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... have such testing performed at an independent laboratory. In addition, you must test a sufficient... Independent Certification Program participants. 431.175 Section 431.175 Energy DEPARTMENT OF ENERGY ENERGY... requirements applicable to non-Voluntary Independent Certification Program participants. If you are...

  15. 46 CFR 175.400 - Definitions of terms used in this subchapter.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... means a pipe or tube of at least 30 millimeters (1.25 inches) in diameter leading down from a deck or... Section 175.400 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS... tested in accordance with ASTM B 117 (incorporated by reference, see 46 CFR 175.600) for 200 hours,...

  16. 21 CFR 175.230 - Hot-melt strippable food coatings.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS...

  17. 21 CFR 175.230 - Hot-melt strippable food coatings.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components...

  18. 21 CFR 175.230 - Hot-melt strippable food coatings.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Hot-melt strippable food coatings. 175.230 Section 175.230 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components...

  19. 40 CFR 300.175 - Federal agencies: additional responsibilities and assistance.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 29 2013-07-01 2013-07-01 false Federal agencies: additional responsibilities and assistance. 300.175 Section 300.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) SUPERFUND, EMERGENCY PLANNING, AND COMMUNITY RIGHT-TO-KNOW PROGRAMS NATIONAL OIL AND HAZARDOUS SUBSTANCES POLLUTION CONTINGENCY...

  20. 40 CFR 300.175 - Federal agencies: additional responsibilities and assistance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 28 2011-07-01 2011-07-01 false Federal agencies: additional responsibilities and assistance. 300.175 Section 300.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) SUPERFUND, EMERGENCY PLANNING, AND COMMUNITY RIGHT-TO-KNOW PROGRAMS NATIONAL OIL AND HAZARDOUS SUBSTANCES POLLUTION CONTINGENCY...