SMALL SIGNAL ANALYSIS OF WAVELENGTH CONVERSION IN SEMICONDUCTOR LASER AMPLIFIERS BASED ON GAIN SATURATION

Wavelength conversion due to gain saturation in a semiconductor laser amplifier(SLA) is theoretically analyzed and also studied experimentally based on small signal model.An analytic expression is developed describing the relationship between conversion efficiency and characteristic parameters of SLA. The numerical simulation results show that the frequency response of the converter is not only limited to the carrier lifetime, but also affected by the saturation power, gain and waveguide internal loss of SLA.