Injection laser with a diffraction grating in its resonator

An investigation was made of the emission spectra of an injection laser with a selective feedback produced by a reflecting diffraction grating. The spectral characteristics of the laser were improved when the natural resonator was replaced with an antireflection coating and when a diode with a conventional resonator was used. A pulsed power in excess of 6 W was obtained at 300°K in a band not wider than 0.1 nm in the first case and 0.45 W in a band not wider than 0.01 nm in the second case.