Spectral and temporal characteristics of the output of an integrated-hybrid heterostructure laser with a Bragg mirror

Experimental results are reported which show that a stripe-geometry integrated-hybrid Bragg laser operates in a single-frequency regime when pumped significantly above the threshold current by either long (60 ns) or short (450 ns) current pulses. The transverse distribution of the field intensity in the spontaneously formed stripe waveguide channel corresponds to the fundamental mode and does not depend on the light intensity. The Bragg mirror can thus stabilize the optical field in the laser in the transverse direction; this property appears to explain the stability of the near-field pattern and the linearity of the power-current characteristics.