Antireflective coatings on facets of GaAlAs laser cavities

The properties of coatings have been analysed theoretically and experimentally throughout the deposition process of ZrO2 films on facets of GaAs/GaAlAs laser cavities with a wavelength of 910nm.The transmissivities of cavity facets have been increased from 62% without coatings to above 94% with coatings.The output power and operating lifetime of Lasers have been improved and the protective effect to laser facet was obtained.