SPECTRAL CHARACTERISTICS OF SINGLE-FREQUE NCY QUANTUM-WELL HETEROLASERS

Precision measurements and a comparative analysis were made of the emi ssion spectra of GaAs/AlGaAs and InGaAs/GaAs heterostructure injection lasers with quantum-well active layers and monolithic plane-plane res onator cavities. Attention was focused on the correlation between the spectral broadening factor and the parameters of single-frequency lasi ng. Single-frequency emission at lambda = 975 nm was observed for a qu antum-well laser with strained active layers and a cw output power in excess of 100 mW was reached when the side longitudinal modes were sup pressed by more than 30 dB.