... a fictitious resonance at a frequency above the first and below the second resonance frequencies. ... be exploited to achieve a high bandwidth or ...

This paper proposes an improved dynamic bandwidth allocation algorithm for dual Quality of Service (QoS) classes to maximize the utilization rate of the Resilient Packet Ring (RPR). To achieve dynamic bandwidth allocation for the two QoS classes in the RPR, each node measures the high priority traffic flow and ...

... engineer's task in designing a high- bandwidth steering mirror. ... stiff to achieve the desired fast response. ... If secondary modes do couple into rotation ...

The feasibility of a 1000:1 bandwidth compression ratio for image transmission has been demonstrated using image-analysis algorithms and a rule-based controller. Such a high compression ratio was achieved by first analyzing scene content using auto-cueing...

Frequency tunable VUV radiation has been generated using excimer lasers and very narrow bandwidth dye lasers by twophoton resonant difference frequency mixing in xenon. Conversion efficiencies of >0.1 percent have been achieved.

Nested concatenated coded 8-phase shift keying (PSK) modulation schemes are proposed to achieve good

... Ring modulators = high density/bandwidth ... technical advantages for silicon photonics to achieve ... Longwave (1300-1600nm), single-mode fiber will ...

RASCAL, shown in Figure 1, is a UH-60, which is being modified in a phased ... on RASCAL will be an FCS design for the aircraft to achieve high bandwidth ...

The phrase 'bandwidth-compressive modulation' means that the compression is achieved not by removing

We demonstrate a large energy output and a wider output spectral bandwidth from Nd:glass-based regenerative amplifiers. The maximum energy extracted from the regenerative amplifier is 24 mJ with an overall gain of 3.4 x 10(8). The maximum output bandwidth achieved is 4.2 nm FWHM when the input pulse spectral ...

An error control coding scheme was devised to achieve large coding gain and high reliability by using coded modulation with reduced decoding complexity. To achieve a 3 to 5 dB coding gain and moderate reliability, the decoding complexity is quite modest. ...

This article presents a high-bandwidth control design suitable for precision motion instrumentation. Iterative learning control (ILC), a feedforward technique that uses previous iterations of the desired trajectory, is used to leverage the repetition that occurs in many tasks, such as raster scanning in microscopy. Two ILC designs are presented. The first design uses the ...

This article presents a high-bandwidth control design suitable for precision motion instrumentation. Iterative learning control (ILC), a feedforward technique that uses previous iterations of the desired trajectory, is used to leverage the repetition that occurs in many tasks, such as raster scanning in microscopy. Two ILC designs are presented. The first design uses the ...

Polarized infrared thermal emitters consisting of a waveguide thermal emitter combined with silver grating structure were studied. For a device containing a perforated silver film under the grating, polarized infrared light was emitted only when the wavelength satisfied the standing wave condition, therefore the broad bandwidth SiO2 phonon vibration modes were suppressed in ...

Voxtel Inc. proposes to optimize the design of a large area, 1.55?m sensitive HgCdTe avalanche photodiode (APD) that achieves high gain with nearly no ...

NASA Lewis Research Center has developed a digital approach for broadcasting high fidelity audio (nearly compact disk (CD) quality sound) in the commercial frequency modulated (FM) broadcast band. This digital approach provides a means of achieving high d...

The earth's ionosphere consists of an ionized plasma which will interact with any electromagnetic wave propagating through it. The interaction is particularly strong at vhf and uhf frequencies but decreases for higher microwave frequencies. These interaction effects and their relationship to the operation of a wide-bandwidth, synthetic-aperture, space-based radar are ...

The earth`s ionosphere consists of an ionized plasma which will interact with any electromagnetic wave propagating through it. The interaction is particularly strong at vhf and uhf frequencies but decreases for higher microwave frequencies. These interaction effects and their relationship to the operation of a wide-bandwidth, synthetic-aperture, space-based radar are examined. ...

The earth's ionosphere consists of an ionized plasma which will interact with any electromagnetic wave propagating through it. The interaction is particularly strong at vhf and uhf frequencies but decreases for higher microwave frequencies. These interaction effects and their relationship to the operation of a wide-bandwidth, synthetic-aperture, space-based radar are examined. ...

High bandwidth requirements in multimedia transmission make the efficient use of limited network resource a challenging task, especially when multiple clients make their requests to the server simultaneously. In this paper, we propose a self-adjusted network transmission mechanism for multiple clients. Instead of assigning a fixed ...

Practical and theoretical limits on the bandwidth of distributed optical phase modulators and traveling-wave photodetectors are given. For the case of perfect velocity matching, RF transmission losses are the main performance-limiting factor. However, some high-performance modulators require highly-capacitive transmission lines making ...

Atomic magnetometers have achieved magnetic sensitivities in the subfemtotesla regime. Their bandwidth is determined by the transverse spin relaxation rate, 1/T{sub 2}, which also determines the magnetic sensitivity. It is theoretically demonstrated that by using an electromagnetically induced transparent probe beam in a pump-probe atomic magnetometer, it ...

An error control coding scheme was devised to achieve large coding gain and high reliability by using coded modulation with reduced decoding complexity. To achieve a 3 to 5 dB coding gain and moderate reliability, the decoding complexity is quite modest. In fact, to achieve a 3 dB coding gain, the decoding ...

Jul 24, 2007 ... PROPOSAL TITLE: Extremelly High Bandwidth Rad Hard Data ... we propose to develop a monolithic high input bandwidth, radiation tolerant ...

Second harmonic generation in optical planar waveguides is the most promising mechanism for frequency doubling of laser emission since light can be highly confined to the nonlinear waveguide medium. However, this advantage is achievable only by precise phase matching between the fundamental wave and the doubled frequency wave, which is hard to control at ...

... every house and office. ... personal computer, high bandwidth data services are in high demand in homes everywhere. ... to the home. ...

Stabilization of laser frequency to interferometers with a large time delay in one arm is of significant interest to space-based gravitational wave detectors such as the Laser Interferometer Space Antenna. A recently proposed technique allows a control bandwidth larger than the inverse delay time to be achieved. We present experimental results ...

From the birth of radar there has been a steady trend to increase the radiated bandwidth to obtain high resolution, extreme accuracy, target identification, and fine imagery. The ultimate radiated waveform to achieve these goals is an impulse. The present...

at fairly coarse resolution, 4-5 bits being common. ...... data rate. However,. 16 QAM bandwidth efficient modulation techniques may expand the achievable ...

... and fall times, a 3-gigahertz bandwidth, 1000 gain, and either S-20 or 1.06 micron InAsP photocathodes achieving 7% quantum efficiency at 5000A ...

Laser beam smoothing achieved with 1-THz-bandwidth, two-dimensional smoothing by spectral dispersion and polarization smoothing on the 60-beam, 30-kJ, 351-nm OMEGA laser system is reported.

The light intensity response and the transfer function of laser are given in small signal in order invest the upper modulation frequency of VCSELs. The cures of the relaxation oscillation frequency and -3dB bandwidth versus the differential gain coefficient and the spontaneous emission lifetime are presented. The results show that the high speed modulation ...

We present a geometrical representation of the process of sum frequency generation in the undepleted pump approximation, in analogy with the known optical Bloch equations. We use this analogy to propose a technique for achieving both high efficiency and large bandwidth in sum frequency conversion using the adiabatic inversion scheme. ...