A single-longitudinal-mode continuous-wave Ho3+YVO_4 laser at 2.05 μm pumped by a Tm-fibre laser.pdf

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1、Chin.Phys.BVol.26,No.1(2017)014204Asingle-longitudinal-modecontinuous-waveHo3+:YVOlaserat42.05mpumpedbyaTm-fibrelaserJingWu(吴婧),YoulunJu(鞠有伦),ZhenguoZhang(张振国),LiweiXu(徐丽伟),TongyuDai(戴通宇)†,BaoquanYao(姚宝权),andYuezhuWang(王月珠)NationalKeyLaboratoryofTun

2、ableLaserTechnology,HarbinInstituteofTechnology,Harbin150001,China(Received24July2016;revisedmanuscriptreceived6October2016;publishedonline10December2016)Wepresentasingle-longitudinal-modecontinuous-waveHo3+:YVO4laserat2.05mpumpedbyaTm-dopedfibrelase

3、r.Useofacavityetalonenablesspectralselectivityforsingle-modeoperation.Thehighestpowerachievedinthesinglelongitudinalmodeat2052.5nmis282mWataslopeefficiencyof6.9%,correspondingtoanopticalconversionefficiencyof3.0%.Thesefeaturesdemonstratethatthissingle-

4、longitudinal-modeHo:YVO4laserissuitableforuseasaseedlaserinsomeLidarsystems(e.g.,coherentLidarordifferentialabsorptionLidar).Tothebestofourknowledge,thisisthefirstreportonsuchasingle-longitudinal-modeHo:YVO4laserat2.05m.Keywords:Ho:YVO4laser,intracav

5、ityetalons,singlelongitudinalmode,Tm-dopedfibrelaserPACS:42.55.Rz,42.60.Lh,42.60.PkDOI:10.1088/1674-1056/26/1/0142041.IntroductionYLFanalogues,YVO4crystalsdopedbyHo3+ionshavesim-ilarupperstatelifetime,widerpumpbandwidth,andlargerSingle-longitudinal-mo

6、de(SLM)solid-statelasersnearemissioncrosssection,allofwhichenablehigherefficiency2mhavebeenwidelyusedasseedlasersforLidarsystemsoflaseroperation.[17,18]Overthepastfewyears,bothQ-owingtotheireyesafetyatlowpowerandgoodtransparencyintheatmosphere.[1,2]T

7、heyalsohaveimportantapplicationsswitchedandcontinuous-wave(CW)Ho:YVO4lasershaveforremotesensing,rangefinding,opticalcommunication,[3,4]beenreported,yettheoutputcharacteristicsofsuchSLMlasershavenotbeeninvestigated.In2013,Duanetal.re-andsoon.Amongtheor

8、dinarytechniquesforachievingSLM[5]portedaCWHo:YVO4laserat2067nmoperatingatroomoperationofasolidstatelaser,includinguseofmicrochips,coupledcavities,[6]twisted-modecavities,[7,8]andintracav-temperaturewithamaximumoutputpowerof0.54Wandaslopeefficiencyof2