Half-ring geometry quantum well GaAlAs lasers

Abstract

Half-ring geometry single quantum well GaAlAs lasers have been fabricated. These lasers rely on a single cleave to obtain both resonator end reflectors. Using a buried-heterostructure waveguide for lateral confinement and a high reflectivity facet coating, threshold currents as low as 14.5 mA and a frequency response extending to 6.5 GHz have been achieved.