Injection heterolaser with a short resonator

A description is given of the construction of an injection heterojunction laser with a short resonator. The results are reported of an experimental investigation of spatial and spectral characteristics of the output radiation of lasers with resonators 30-100 μ long. It is reported that the method of planar technology can be used to fabricate lasers operating nearly in the single-frequency regime. It is shown that the excitation of spatial modes in the p–n junction plane broadens the emission spectra. This makes it possible to achieve single-frequency pulsed stimulated emission of a line of half-width 0.2 nm with a power of 30 mW per pulse.