Polarization-stable　980nm　oxide-confined　vertical-cavity　surface-emitting　lasers　with　3　mu　m　diamond-shaped　aperture　are　fabricated　by　comprehensively　utilizing　the　anisotropic　properties　of　wet　etching　and　wet　nitrogen　oxidation　of　III-V　semiconductor　materials.　Polarization-stable　operation　along　the　major　axis　of　the　diamond-shaped　oxide　aperture　with　11　dB　orthogonal　polarization　suppression　ratio　is　achieved　in　a　temperature　range　of　15-55　degrees　C　from　the　threshold　to　4　mA.