In　order　to　stabilize　the　coupling　efficiency　of　the　laser　beam　from　the　semiconductor　laser　through　optical　fiber,　a　laser　with　groove　structure　was　proposed,　and　the　laser　beam,　coupling　efficiency　and　P-I　characteristics　were　researched.　The　periodic　grooves　in　the　ridge　region　of　the　laser　were　etched　to　improve　the　gain　distribution　in　the　active　region　of　the　laser.　The　laser　beams　of　the　common　laser　and　the　groove　structure　laser　were　analyzed,　the　coupling　efficiency　and　P-I　characteristics　were　tested.　The　results　show　that　the　strip　laser　with　groove　structure　can　stabilize　the　cavity　mode,　avoid　the　＇Kink＇　effect　and　improve　the　coupling　efficiency　to　97.7%.　The　laser　with　groove　structure　can　solve　the　phenomenon　of　optical　filaments　fluctuation　effectively　and　improve　the　stability　coupling　efficiency　of　the　beam.　©　2017,　Science　Press.　All　right　reserved.