57% wallplug efficiency oxide-confined 850 nm wavelengthGaAs VCSELs

Abstract

Vertical-cavity surface-emitting lasers with reduced effective index guiding of the optical wave show a record performance. GaAs based 850 nm emission wavelength VCSELs are fabricated using solid source MBE and carbon p-type doping. Depending on device design maximum room temperature conversion efficiencies of 57%, an operating range from –80°C up to +185°C, and threshold currents below 500 µA from –40 to +80°C have been obtained.