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时间:2020-04-24
《基于腔内偏振分束器偏振控制的线偏振掺镱双包层光纤激光器-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、第34卷第7期光学学报Vo1.34,No.72014年7月ACTA0PTICASINICAJuly,2014基于腔内偏振分束器偏振控制的线偏振掺镱双包层光纤激光器冯德军刘冠秀张茂森刘希路宁鼎姜守振。山东大学信息科学与工程学院,山东济南250100中国电子科技集团公司第46研究所,天津300220山东师范大学物理与电子科学学院,山东济南250014摘要研究了一种单双波长可切换的线偏振掺镱双包层光纤激光器结构,腔内插入可以绕光轴方向旋转的立方体偏振分束器(PBS)进行偏振控制,实现单双波长的转换。激光谐振腔由高反射率的双色镜和较低反射率(10.2%)的保偏光纤布拉格光栅(PM—FB
2、G)构成;由于保偏光纤光栅的偏振选择反馈作用增强了偏振烧孔效应,通过调节谐振腔内偏振分束器的旋转角度实现了激光的单双波长之间的切换。利用琼斯矩阵理论分析了偏振态与旋转角度的关系,其结果与实验结果吻合。实验中输出激光的双波长为1070.08nm和1070.39nm、功率为1w、激光信噪比为48dB、斜率效率为34、3dB带宽为0.02rim。利用格兰一汤姆孙棱镜对该激光的偏振特性进行了研究:单波长运转时为线偏振激光,偏振度达l3.37dB;双波长运转时为正交偏振激光。关键词激光器;掺镱光纤激光器;保偏光纤布拉格光栅;偏振度;斜率效率中图分类号TN253文献标识码Adoi:10.3
3、788/AOS201434.0714002LinearPolarizedYb。-DopedDouble.CladFiberLaserwithanIntracavityCubicP0larizati0nBeamSplitterasP0larizationSelectionFengDejunLiuGuanxiuZhangMaosenLiuXiluNingDingJiangShouzhen。SchoolofInformationScienceandEngineering,ShandongUniversity,Jinan,Shandong250100,ChinaChinaElectro
4、nicsTechnologyGroupCorporationNo.46ResearchInstitute。Tianj300220,China。CollegeofPhysicsandElectronics,ShandongNormalUniversity,Jinan,Shandong250014,ChinaAbstractAsingleanddual-wavelengthswitchablelinearpolarizationYb-dopeddouble·-cladfiberlaserconfigurationisproposed,inwhichtheresonancecavit
5、yiscomposedofafiberBragggratingfabricatedinapolarizationmaintainingfiberandahighrefiectivitydichromaticmirror.Acubicpolarizationbeamsplitter(PBS)rotatingarounditsownopticaIaxisisinsertedbetweenthehighreflectioncavitymirrorandthecollimatorinthelasercavity,whichisusedtoadjustthepolarizationtor
6、ealizesingleanddual-wavelengthlasingemission.ThepolarizationholeburningisenhancedbytheselectivepolarizationfeedbackfromthepolarizationmaintaningfiberBragggrating(PM—FBG).TherelationshipbetweenpolarizationstatesandrotatingangleofPBSisanalyzedbyusingJonesmatrix,whichagreeswel1withtheexperiment
7、alresults.Thelaserfeatureswavelengthof1070.08nmand1070.39nm,outputpowerof1.0W,signalnoiseratioof48dB,slopeefficiencyof34%,aswellasaverynarrowlinewidthof0.02nm.ThepolarizationcharacteristicsarestudiedbymeasuringthelaserpowertransmittedthroughaGlan—T
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