SUPERLUMINESCENCE SPECTRA AND MAIN PECULIARITIES OF STRIPE-GEOMETRY SINGLE-QUANTUM-WELL INJECTION INGAAS LASERS WITH A STRAINED ACTIVE LAYER

A number of smooth equidistant peaks were detected in the superlumines cence spectrum of stripe-geometry single-quantum-well InGaAs lasers wi th a strained active layer in the wavelength range of 0.98 mum. Within the limits of the spectral envelope with the width of about 200 angst rom, the indicative separation between the peaks varied from 20 to 40 angstrom for different lasers, which corresponded to from 10 to 20 int ermode intervals of the Fabry-Perot cavity. Several possible physical models describing the origin of the observed peaks are assessed, such as a radiative recombination of electrons and holes in accordance with the selection rules DELTAu = 0 and DELTAu = 1, 2,..., where u is the number of levels, and a resonant self-action of the radiation field of Fabry-Perot modes through the volume of the laser crystal, whose laye rs, including a GaAs substrate, are transparent to 0.98-mum radiation. The latter model is supported by experimental results.