By　the　use　of　a　semiconductor　gain　chip　with　InGaAs　multiple　quantum　wells　as　materials　in　the　active　region　and　the　AlGaAs/AlAs,　transparent　to　the　pump　light,　as　distributed　Bragg　reflectors,　along　with　the　end-pump　geometry　to　simplify　the　device　structure　and　an　inserted　etalon　as　the　tuning　element,　an　optically-pumped　compact　tunable　external-cavity　surface-emitting　green　laser　is　realized　by　the　intra-cavity　frequency　doubling　technology.　The　employed　etalon　narrows　the　laser　linewidth　as　a　tuning　element.　To　prevent　the　second　harmonic　from　returning　to　the　gain　chip,　the　etalon　is　coated　with　a　high-reflectivity　film　at　the　wavelength　of　the　second　harmonic.　The　tuning　range　of　the　fundamental　wave　is　over　10　nm　and　that　of　the　second　harmonic　is　4　nm　centering　at　559　nm.　The　spectral　linewidth　of　the　second　harmonic　is　1.0　nm　and　the　maximum　output　power　is　65　mW.　©　2019,　Chinese　Lasers　Press.　All　right　reserved.