简介：Anintracavityfrequency-doubledverticalexternalcavitysurfaceemittinglaser(VECSEL)withgreenlightisdemonstrated.ThefundamentalfrequencylasercavityconsistsofadistributedBraggreflector(DBR)ofthegainchipandanexternalmirror.A12-mWfrequency-doubledoutputhasbeenreachedat540nmwithanonlinearcrystalLBOwhenthefundamentalfrequencyoutputis44mWat1080nm.Thefrequencydoublingefficiencyisabout30%.

简介：Adiode-end-pumpedelectro-optic(EO)Q-switchedgreenlaseroperatingattherepetitionrateof20kHzisreported.AblockofLa_3Ga_5SiO_(14)(LGS)singlecrystalisusedasaQ-switchandthetypeⅠphase-matchingLiB_3O_5(LBO)isusedasthenonlinearcrystalinthesecondharmonicgeneration.The2.3-Waveragepowerof532-nmgreenlaserisobtainedattherepetitionrateof20kHzwiththepulsewidthasshortas10ns.Whentheoutputpowerisabout1.5W,themeasuredpowerfluctuationislessthan1.4%(root-mean-square,RMS)withthebeamqualityfactorofM~2<2inbothorthogonaldirections.