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时间:2019-03-07
《1999 Theoretical modelling and experimental investigations of the diode-pumped thin-disk Yb YAG laser.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、QuantumElectronics29(8)697^703(1999)ß1999KvantovayaElektronikaandTurpionLtdPACSnumbers:42.55.Rz;42.55.Sa;42.55.XiTheoreticalmodellingandexperimentalinvestigationsofthediode-pumpedthin-diskYb:YAGlaserKContag,MKarszewski,CStewen,AGiesen,HHu«gelAbstract.Thefundamentalprinciplesoftheope
2、rationofaingtheactiveelementwasreported[2].Thishasmadeitsolid-statelaserarepresentedforthecasewhentheactivepossibletousealsoquasi-three-levelactivemedia[3].Studieselementisathindisk.Ananalyticalmodelofthislaserishavealsobeenmadeofweakeningthethermallenseffectindeveloped.Themodelisus
3、edtocalculatetheinfluenceofslablasers.thevariousparametersontheoperationalefficiencyoftheAsregardsthebeamquality,however,theprincipallaser.Adetailedmodelisalsodevelopedforcalculationsadvantagesprovidedbydiodepumpingofsolidstatemedia,relatingtoaspecificlaserdesignandthismodeltakestha
4、tishighefficiencyandhighbeamquality,havenotyetaccountofthegeometryoftheactivemedium,ofthediodebeenfullyexploited.Fig.1showsthebeamqualityparameter2pumpconfiguration,andoftheoperatingconditions.M(thefactorbywhichthebeamdivergenceexceedstheExperimentsyieldedacwoutputpowerupto350Wanddi
5、ffractionlimit),asafunctionofthecwoutputpower.Inanopticalpumpingefficiencyof50%(thecorrespondingthecaseofCO2lasersthisparameterisclosetoone,whereasvaluesobtainedinthissingle-moderegimewereapproxi-diode-pumpedsolidstatelasersofferapotentialimprove-mately100Wand440%).Theseresultswere
6、obtainedmentofalmost2ordersofmagnitudeevenathighpowerbelow08Cforeightpassesofthepumpradiationthroughlevels.theactivemedium.Atroomtemperatureandfor16passesAhighbeamqualitycanbeobtainedbyappropriateres-thesameparameterswereseveraltensofwattsandaneffi-onatordesignandarigorousreductiono
7、fthethermaleffectsciencyupto58%.Theseexperimentalresultswereingoodinsidetheactivemedium.Thismeansthatthethermallensingagreementwiththepredictionsofthetheoreticalmodel.effectshavetobeavoidedorcontrolledinsuchawaythatnodetrimentaleffectswilloccur.Onepossibilityistoorientthe1.Lasersfor
8、materialprocessingh
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