A. Uskov et al., TERAHERTZ 4-WAVE-MIXING IN SEMICONDUCTOR OPTICAL AMPLIFIERS - EXPERIMENT AND THEORY, Applied physics letters, 65(8), 1994, pp. 944-946
Highly nondegenerate four-wave mixing processes in bulk semiconductor
optical amplifiers are analyzed by comparing experimental data at detu
ning frequencies up to 3 THz with numerical calculations based on semi
classical density-matrix equations. Carrier heating and spectral holeb
urning are found to be dominant in mediating wave mixing in the THz re
gion and lead to comparable contributions to nonlinear gain suppressio
n in semiconductor lasers.