66% CW wallplug efficiency from Al-free 0.98 µm-emittingdiode lasers

Abstract

0.98 µm-emitting, broad-waveguide-type InGaAs/InGaP/GaAs diode lasers have been optimised for maximum wallplug efficiency. Optimised-facet-coated, 100 µm-widestripe, 500 µm-long devices having InGaAsP optical-waveguide thicknesses of 0.6 and 1.2 µm provide maximum wallplug efficiencies of 66% and 62%, respectively. Carbon-doped cap layers allow for a series resistance of 0.08 Ω for devices with 100 × 500 µm2 contact area.