In　order　to　increase　the　wavelength　tuning　range　of　the　tunable　laser　and　improve　the　reliability　and　stability　of　the　system,　a　wavelength　tunable　vertical　cavity　surface　emitting　laser　with　a　central　wavelength　of　852　nm　was　designed　based　on　the　characteristics　of　electrically　controlled　birefringence　of　liquid　crystal.　The　physical　principle　that　the　structure　obtained　a　wide　range　of　wavelength　tuning　and　single　polarization　stable　output　was　analyzed,　and　the　reflection　spectra　corresponding　to　the　thickness　of　different　liquid　crystal　layers　under　the　whole　device　were　further　calculated　by　the　transfer　matrix　method,　the　lasing　wavelength　of　laser　with　different　thickness　and　refractive　index　of　liquid　crystal　was　obtained.　The　results　show　that　the　tuning　range　of　the　liquid　crystal　tunable　laser　with　single　polarization　reaches　31　nm　and　the　tuning　efficiency　is　more　than　10　nm/V.　©　2018,　Science　Press.　All　right　reserved.