A　method　of　balancing　the　output　power　and　threshold　current　property　of　vertical　cavity　surface　emitting　laser　is　studied.　The　relationship　between　proton　implantation　energy　and　device　performance　is　analyzed　by　simulation　and　experiment.　It　is　found　that　a　higher　injection　energy　can　destroy　the　active　region,　thus　reducing　the　output　power　property.　The　threshold　current　will　be　increased　since　a　lower　injection　energy　may　weaken　the　restriction　on　the　injection　current.　The　results　indicate　that　315　keV　injection　energy　is　the　right　choice　for　our　device　structure.　The　output　power　and　threshold　current　obtained　under　10um　aperture　are　1.7　mW　and　4.3　mW,　respectively.