The effects ars reported of sulphur treatment in Na2S and (NH4)(2)S solutio
ns for the passivation of AlGaAs laser facets, etched using Cl-2-based chem
ically-assisted-ion-beam-etching. Compared to untreated lasers, a 37% avera
ge improvement in the catastrophic optical mirror damage threshold is measu
red on sulphur-treated broad-area CAIBE lasers.