Spatio-Spectral Wave Mixing in High-Power Amplifier and Laser Systems

Abstract

In this chapter we present results of detailed numerical modelling of semiconductor laser amplifiers. The model is based on the Maxwell--Bloch--Langevin equations presented in Chap. 2 and Chap. 3 and includes all relevant dynamic microscopic and macroscopic processes responsible for the special emission properties of high-power amplifiers. Since the active area of high-power laser amplifiers is large compared to characteristic length scales given by e.g. carrier diffusion and diffraction, the longitudinal and transverse dependence of the optical fields as well as their counterpropagation are of particular importance.