Mirror passivation of InGaAs lasers

Abstract
The authors report a mirror passivation technique for high power 980 nm lasers. The technique involves depositing a film of gallium oxide on the facet immediately after facet cleaving. Photoluminescence measurements show that the GaAs surface covered with in situ deposited gallium oxide has two orders of magnitude higher luminescence than that for bare GaAs surface. Lasers with good aging characteristics have been fabricated.