Investigation of the dynamics of emission from a "radiating mirror" semiconductor laser with an external resonator

The emission of such a laser was in the form of irregular spikes when several nonaxial modes were excited. An increase of the distance to the external mirror (L > 15 mm) resulted in the excitation of just the dominant mode, and irregular spikes were no longer observed. For distances (L > 10 mm the modes were self-locked when the current density exceeded the threshold by a factor of 1.2–1.4. Deposition of an antireflection coating on the internal surface of the semiconductor plate reduced the width of the angular distribution of the output radiation.