TEMPORAL DYNAMICS AND FACET COATING REQUIREMENTS OF MONOLITHIC MOPA SEMICONDUCTOR-LASERS

Dynamics of temporal instabilities in tapered broad-area semiconductor master oscillator/power amplifier lasers are experimentally investiga ted, multigigahertz self-pulsations are evident in the optical and tem poral spectra along with coupled-cavity modes due to the finite output -facet reflectivity. From a previously developed time-dependent couple d-wave model, it is shown that by adjusting the grating strength in th e distributed Bragg reflector (DBR) section of the master oscillator t he antireflection facet coating requirements can be relaxed. Increased stable operation at high powers is then possible.