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ID:31995855
大小:3.77 MB
页数:80页
时间:2019-01-30
《全固态激光器热激发泵浦和综合泵浦技术.研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、ABSTRACTInthisdissertation,wefirstlyinvestigatetheoutputperformancesofNd:YAGandNd:YV04laserunderthermallyboostedpumping/directpumpingcombinedwiththerateequationsoffour-levelsystem,usinganall-solid—statequasi—continuoustunableTi:Sapphirelaserastheirpumpsource.Thebettermodematchi
2、ngbetweenthepumpandoscillatingbeamwasobtainedbytheoptimizationoflasercavity,andthehigh.efficiency1.06一Ⅲnand1.3-lainoutputwereachieved.Comparativeresultsobtainedbytraditionalpumpingat808nm.Throughtheexperiments,werealizethatthe808.amtraditionalpumpingcanachievehighoptical-to—opt
3、icalefficiency,whileintroduceplentifulheatgeneration.Thethermallyboostedpumping/directpumpinghashigherslopeefficiencyandlowerheatgeneration,butwithloweroptical..to..opticalconversionefficiencyowingtothelowabsorptioncoefficiency.Basingontheexperimentresults,webringforwardanovelp
4、umpingschemenamedsyntheticalpumpingbycombiningtheadvantagesofthesetwopumpings.Tolookforwardtothebalancepointbetweentheweaknesses(plentifulheatgenerationandlowabsorptioncoefficient)oftwopumpingmethods,expectantly,syntheticalpumpingwilldecreaseheatgenerationgreatlywhilereducetheo
5、utputpowerslightly,whichisadvantageoustothelaseroperation,especiallyforthehighpowersolid。statelasers.Wemainlydosomeworkasfollows:1.Basingontherateequationsoffour-levelsystem,wededucetheoutputperformancesoflaserspumpedbythermallyboostedpumping/directpumping,besides,wecalculateth
6、eheatgenerationinlasermedium;2.Takingthethermaleffectsintoaccount,weobtainthebettermodematchingbetweenthepumpandoscillatingbeambyoptimizingthelasercavity;’‘3.Underdirectpumping,weresearchtheoutputperformancesof1064nmand1342nmof.Nd:YV04laserwithdifferentdopingconcentrations.When
7、theincidentpumppowerwas2.1Wwhiletheabsorbedpumppowerof1.7WjWegainedthe1.21Woutputof1064nm,withoptical-to-opticalconversionefficiencyof57.6%,thethresholdandtheslopeefficiencyinabsorbedpumppowerwas75.3%and200mW,respectively.Moreover,wemeasuredtheheatgenerationinthelasermediumunde
8、rdifferentpumpings.Whentheincidentpumppowerwas1.8Wwhil
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