Patent ID: 6185241
Filing Date: 2001-02-06
Classification: H01S

Abstract:
A surface emitting laser for emitting coherent light comprising:a substrate;a plurality of semiconductor layers formed on said substrate;one or more of said plurality of semiconductor layers forming an active region;a conductive oxide semiconductor layer being one of said plurality of semiconductive layers,an annular metal layer formed on said conductive oxide semiconductor layer, said annular metal layer forming an output window for the fundamental mode of coherent light emitted by said active region, said annular metal layer suppressing reflectivity for the high orders of coherent light emitted by said active region;a mirror of dielectric layers having quarterwave thickness formed on said annular metal layer and within said annular metal layer on said conductive oxide semiconductor layer; andfirst and second electrodes which enable biasing of said active region to emit coherent light, said first electrode being formed on said annular metal layer.