SPECTROTEMPORAL GAIN DYNAMICS OF OPTICALLY PUMPED II-VI MULTIPLE-QUANTUM-WELL STRUCTURES

The real-lime resolved stimulated emission and gain dynamics of optica lly pumped conventional edge-emitting II-VI quantum-well-laser structu res are investigated. In the emission as well as in the gain, features of carrier heating and pronounced kinetic hole-burning are observed. It will be shown that these effects develop already just above the las ing threshold intensity. At high pump fluxes, spectra of the emission clearly show that the formation of the kinetic hole is accompanied by the occurrence of a spectral hole in resonatorless samples. This compl ex spectre-temporal dynamics has never been observed before and points to a more rapid gain depletion at the peak energy compared to the spe ctral wings of the stimulated emission. (C) 1998 Elsevier Science B.V. All rights reserved.