Ultrashort Pulse Effects in Semiconductor Amplifiers in Dispersive Media

摘要

The researchers developed a code for integrating envelope equations derived fromscalar Maxwell's equations for a scalar field coupled to the SCB equations. This code can handle plane wave (one dimensional) and a single transverse dimension (two dimensional). At this time, the codes are being used to study the behavior of ultrashort pulses propagating in the nonlinear medium. The case of a semiconductor amplifier has been the focus. They have been able to integrate the plane wave equations for considerably longer propagation distances than had been possible previously due to the efficiency of the algorithm. In so doing, they have predicted novel effects such as pulse compression, the appearance of an adiabatic following behavior, and spontaneous pulse breakup for very high gain amplifiers. In addition they have made a study of the interactions in such an amplifier of simultaneous ultrashort strong pulses at different frequencies. This is to the ability of such a device to be used with frequency multiplexing.