Power broadening of coherent energy transfer in semiconductor gain media

Coherent energy transfer gives rise to a new peak and dip in the probe gain spectrum that moveproportionally with the mtracavity injected power, showing that stimulated emission and absorptionsignificantly speed up the semiconductor response.1. INTRODUCFIONThe interaction of two optical beams in a nonlinear medium leads to important nonlinearprocesses'. These include coherent energy transfer (CET) where nondegenerate fields, copropagating ina nonlinear medium may exchange energy [an example of multi-wave mixing (MWM)]. If the responseof the medium is "nonlocal, "'