LD泵浦532nm綠光及355nm紫外激光器研究.pdf

1、西北大學碩士學位論文LD泵浦532nm綠光及355nm紫外激光器研究姓名：沈兆國申請學位級別：碩士專業(yè)：光學指導教師：白晉濤20090612ABSTRACTLDpumpedallsolidstatelasertechnologyutilizeslaserdiodeorarraypumplasergainmediutn(suchasNd：YAG，Nd：YV04，Nd：GdV04，Yb：YAGTm，Ho：YV04，etc)toproduce

2、afundamentalfrequencylightThenthefundamentalfrequencylightbythenon—linearopticalfrequencyconversioncrystals(suchasKTP，LBO，BBO，PPLN，PPKTP，etc)andnonlinearopticalfrequencyconversiontechnologyofdoublingfrequency，sumfrequenc

3、y，deferencefrequencyandquasiphasematching，obtainsinfraredvisiblelightultravioletwavelengthslaseroutputThisdissertationhasmadetheoreticalanalysisandexperimentalstudyonLDpumpedall—solidstatelasersIntheory，onthebasicofrecal

4、lingthedevelopmentofallsolid—statelasersandnonlinearopticalfrequencyconversiontechnology，theultra—violetvisiblelightinfraredlightlaseraccessmethods，applicationandprogressaresimplyexplored，andthetheoryandtechnologyofnonli

5、nearoptical，opticalresonatorandQswitchedisanalyzedIntheexperiment，acoolingsystembasingoncombinationofwatercooledandaircooledofLDendpumpedcontinuousgreenlaserLDsidepumped1064nmpulselaserandelectroopticQ—switched532nm／355n

6、mpulselaserarestudyedTheexperimentalcontentofmainworkandinnovationCanbesummarizedasfollows：1Thecoolingsystembasingonacombinationofwater—cooledandair—cooledisdesignedItissmallsize，highefficiency，goodstability，lownoise，and

7、hastheadvantageofwatercooledandaircooledinfavorofhighpowerlaserminiaturization2Throughthesystemcoolinglasercrystalandfrequencydoublingcrystal，usingendpumpedNd：YV04andintracavityKTPfrequencydoubled，stablecontinuousgreenla

8、seroutputisacquiredWhenthecrystalabsorbsthepumppowerof243W，42Wof532umstablegreenlaserisacquired1ightopticalconversionefficiencyreachingtol73％3ThetheoryofpulsedlaseroutputpowerofthebesttransmissionisanalyzedBy1064nmlasere

9、xperiment，60％of1064nmthebesttransmittancelaserisfixed，getingupto1027WlaseroutputwithoutelectroopticQ—switcheddevice，236Wpulselaseroutputwithit4SidepumpedelectroopticQswitchedgreenlaserisdesignedwiththeplaneplanestraighte

10、xtracavitydoublingfrequencyWhenthepumpcurrentis120A，weobtainthehighestgreenoutputpowerof362W1064nmto532nmofconversionefficiencyof153％andfoundintracavityfrequencydoublingtheoutputpowerisrelativelylow5BylItypeKTPfrequencyd

11、oublingcrystalandtheIItypeLBOdeferentfrequencyforcriticalphasematchingofexternalcavity，whenelectro—opticQswitchedrepetitionrateis600Hz，thehighestaveragepowerof375mW，pulsewidthof12ns，singlepulseenergyof0625mJandpeakpowero

12、f521kWof355nmUVpulselaserisobtainedFinally，thecavitydesign，thelenscoatingselection，frequencydoublingcrystalandsumfrequencycrystalselection，electroopticQswitched，Q—switchedcrystal，andpowersupplydesignareanalyzed，whichurge