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A dynamical model for multichannel amplification by near-traveling-wave optical amplifiers is presented, and results on crosstalk induced by either amplitude modulation or frequency modulation are given. The mechanisms influencing the crosstalk are especially the residual facet reflectivities and the detuning of the channels relative to the amplifier Fabry-Perot spectrum. Calculations of worst ...

Cochlear frequency tuning is based on a mildly tuned traveling-wave response that is enhanced in amplitude and sharpness by outer hair cell (OHC)-based forces. The nonlinear and active character of this enhancement is the fundamental manifestation of cochlear amplification. Recently, mechanical (pressure) and electrical (extracellular OHC-generated voltage) responses were simultaneously measure...

In this paper, the coupled dispersive (2+1)-dimensional long wave equation is studied. The traveling wave hypothesis yields complexiton solutions. Subsequently, the wave equation is studied with power law nonlinearity where the ansatz method is applied to yield solitary wave solutions. The constraint conditions for the existence of solitons naturally fall out of the derivation of the soliton so...

in this paper, the coupled dispersive (2+1)-dimensional long wave equation is studied. the traveling wave hypothesis yields complexiton solutions. subsequently, the wave equation is studied with power law nonlinearity where the ansatz method is applied to yield solitary wave solutions. the constraint conditions for the existence of solitons naturally fall out of the derivation of the soliton so...

This article discusses the-state-of-the-art of the vaneloaded gyrotron traveling wave tube (gyro-TWT) amplifier, which is device of increasing importance for high resolution radar and high information density communication systems because of its high-power and broad bandwidth capabilities. Vane loading is identified as a means to achieve a low-beam energy, high-harmonic, low-magnetic field, mod...

A technique of Satellite Communication technologies based on Neural Networks approach is proposed for modeling nonlinear memoryless communication channels in satellites. The input and output data of the Traveling Wave Tube Amplifier (TWTA) is taken and a Neural Network model is designed to simulate the functionality of TWTA. The idea is presented to use the learning quality and generalization o...

The demonstration of a 75-305-GHz power amplifier (PA) monolithic microwave integrated circuit (MMIC) is presented in this letter. PA based on an eight-cell traveling-wave unit (UA). Each cell contains RF cascode with two two-finger transistors gate width 20 ?m each. In the output stage, balanced configuration combines UAs Lange couplers. front, third UA used as driver amplifier. MMIC fabricate...