DYNAMICS OF GAIN AND STIMULATED-EMISSION IN II-VI LASER-DIODES

The dynamics of gain and stimulated emission of II-VI laser diodes is investigated after picosecond optical pumping. For this purpose we use time-resolved variable stripe-length measurements to study tile gain dynamics after pulse excitation in waveguide geometry. Features of car rier heating and pronounced kinetic hole burning are observed in tile transients of stimulated emission and gain. At high excitation densiti es spectral hole burning effects are additionally observed. The spectr al hole recovers on a time scale of some picoseconds. We give an expla nation in terms of a microscopic laser theory which is based oil the n on-equilibrium Green's function technique.