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时间:2020-04-27
《LD抽运声光调Q1064nm窄脉宽激光器-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、激与光电子学进展51,091402(2014)Laser&0ptoelectronicsProgress~2014(中国激光》杂志社LD抽运声光调Q1064Hi窄脉宽激光器董小龙付喜宏高兰兰张帆焦石纪冠东长春理工大学理学院,吉林长春130022中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室,吉林长春130033摘要激光二极管(LD)抽运固体激光器(SSLs)通过声光(A—O)调Q方法获得的短脉冲激光在激光测距、激光雷达等领域有着广泛的应用。从调Q速率方程出发,通过理论分析与合理的模拟,解释了
2、脉冲输出平均功率和脉冲宽度与反转粒子数密度之间的关系。为了获得脉宽相对较窄的脉冲输出,在平~平谐振腔结构中使用LD单端抽运偏振吸收与发射的Nd:YVO晶体,在抽运电流为32.6A,重复频率为33.5kHz,腔长为62mm,输出镜透射率为50%的条件下获得了最短脉冲宽度为4.4ns的脉冲激光输出。在抽运电流为31.6A,腔长为77mm的条件下,获得脉冲宽度为5.5ns、峰值功率为26kW的1064nm脉冲激光输出。并且讨论了腔长、重复频率以及输出耦合镜透射率与脉冲宽度的变化关系。关键词激光器;激光二极管抽运固体
3、激光器;窄脉宽;声光调q;有效储能时间中图分类号0437文献标识码Adoi:10.3788/LOP51.091402NarrowPulseWidthLaserDiodePumpedAcousto--OpticallyQ·Switched1064HiLaserDongXiaolongFuXihong。GaoLanlanZhangFanJiaoShiJiGuandongCollegeofScience,ChangchunUniversityofScienceandTechnology,Changchun,Jili
4、n130022,ChinaStateKeyLaboratoryofLuminescenceandApplications,ChangchunInstituteofOptics,FineMechanicsandPhysicsChineseAcademyofSciences,Changchun,Jilin130033,ChinaAbstractNarrowpulselasercanbeobtainedfromlaserdiode(LD)pumpedacousto—optically(A一0)Q—switcheda
5、llsolidstatelasers(SSLs),whichisusefulinmanyapplicationssuchaslaserranging,laserradar,etc.Accordingt0Q—switchingrateequation,therelationshipsbetweenpulseaveragepower,pulsewidthandinvertedpopulationdensityareexplainedbytheoreticalanalysisandreasonablemode1.L
6、DsidepumpedNd:YVO4crystalwhichispolarizedabsorptionandemissioninaflat—flatcavityisusedtoachievenarrowerpulsewidth.Onconditionsthatthepumpedcurrentis32.6A,therepetitionrateis33.5kHz,thecavitylengthis62mm,thetransmittanceis50%,theshortestpulsewidthof4.4nsisob
7、tained.Onconditionsthatthepumpedcurrentis31.6A.thecavitylengthis77mm.a1064nmlaseroutputwiththepulsewidthof5.5nsandthepeakpowerof26kWisobtained.Cavitylength.repetitionrateandtransmittanceofOHtputmirrorasfunctionsofpulsewidthhavebeendiscussed.Keywordslasers;l
8、aserdiodepumpedallsolidstatelasers;narrowpulsewidth;acousto—opticallyQ——switched;effectiveeriergystoragetimeoCIScodes140.3538;140.3540;140.3430l引言由于声光(A-O)调Q方法是有低插入损耗和较小的时间抖动,并且在连续可调谐脉冲重复频率下可以提供高稳定性,所以
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