收稿日期:2022-02-24基金项目:吉林省科技厅基础研究专项基金(202002046JC)作者简介:杨晓宁(1997-),女,硕士研究生,E-mail:ningning776@qq.com通讯作者:陈薪羽(1986-),女,博士,副研究员,博士生导师,E-mail:chenxinyucust@163.com单LD双端同向π偏振泵浦Tm:YLF激光器杨晓宁,周冠龙,李玥,刘景良,陈薪羽(长春理工大学物理学院,长春130022)摘要:2μm激光作为高相干辐射光源,在激光医疗、激光雷达、光电对抗、材料加工等领域有非常重要的应用价值。通过建立考虑能量传递上转换效应的Tm:YLF激光器速率方程,从而分析了能量传递上转换(EnergyTransferUpcon‐version,ETU)效应对Tm:YLF激光器输出特性的影响;仿真分析双端偏振泵浦Tm:YLF晶体泵浦光分布情况。基于上述仿真分析结果,为获得更高的激光输出功率,采用单LD双端同向π偏振泵浦Tm:YLF激光器方法,提高增益介质的增益效果;当注入功率为47.43W时,实现了稳定的最大激光输出功率为15.23W,中心波长为1907.46nm,输出线宽为1.62nm,对应光-光转换效率为32.11%,斜率效率为37.24%。关键词:Tm:YLF激光器;能量传递上转换效应;同向偏振中图分类号:O531文献标志码:A文章编号:1672-9870(2023)01-0012-06Tm:YLFLaserwithaLaserDiodeDouble-Endπ-CopolarizedPumpYANGXiaoning,ZHOUGuanlong,LIYue,LIUJingliang,CHENXinyu(SchoolofPhysics,ChangchunUniversityofScienceandTechnology,Changchun130022)Abstract:Asahighcoherentradiationsource,2μmlaserhasveryimportantapplicationvalueinlasermedical,LIDAR,photoelectriccountermeasure,materialprocessingandotherfields.TherateequationofaTm:YLF(yttriumlithiumfluoride)laserwithenergytransferup-conversion(ETU)operationwasestablished,andtheinfluenceofenergytransferup-conversionontheoutputcharacteristicswasanalyzed.Furthermore,thepumplightdistributionoftheTm:YLFcrystalwithdouble-endpolarizationpumpingwasanalyzed.Inordertoobtainhigherlaseroutputpower,theconstructedTm:YLFlaserwithalaserdiodedouble-endπ-co-polarizedpumpwasachievedaninjectionpowerof47.43Wandamaximumoutputpowerof15.23Waswellasacenterwavelengthof1907.46nmandaline-widthof1.62nm.Furthermore,aslopeefficiencyof37.24%andanoptical-opticalconversionefficiencyof32.11%we...