1.7μm LD共振泵浦Tm∶YAG单晶光纤激光器  

1.7μm LD Resonantly Pumped Tm∶YAG Single Crystal Fiber Laser

作　　者：董继飞 王剑磊 郑昌盛 刘坚 杜天一 陈彬 周晶晶[1] 张宁 王占新 赵永光[1] 徐晓东[1] 王春 徐军 Dong Jifei;Wang Jianlei;Zheng Changsheng;Liu Jian;Du Tianyi;Chen Bin;Zhou Jingjing;Zhang Ning;Wang Zhanxin;Zhao Yongguang;Xu Xiaodong;Wang Chun;Xu Jun(Jiangsu Key Laboratory of Advanced Laser Materials and Devices,Jiangsu Normal University,Xuzhou 221116,Jiangsu,China;Center for Optics Research and Engineering,Shandong University,Qingdao 266237,Shandong,China;School of Physics Science and Engineering,Institute for Advanced Study,Tongji University,Shanghai 200092,China;Jiangsu Advanced Laser Materials and Devices International Cooperation Joint Laboratory,Xuzhou 221116,Jiangsu,China)

机构地区：[1]江苏师范大学江苏省先进激光材料与器件重点实验室,江苏徐州221116 [2]山东大学光学高等研究中心,山东青岛266237 [3]同济大学高等研究院物理科学与工程学院,上海200092 [4]江苏省先进激光材料与器件国际合作联合实验室,江苏徐州221116

出　　处：《中国激光》2024年第6期14-19,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(62075090,52032009);江苏师范大学研究生研究与实践创新项目(2021XKT1205)。

摘　　要：单晶光纤(SCF)具有长径比高、比表面积大、散热好等优势,近年来成为高功率激光振荡器及放大器的选择材料之一。采用光线追迹法,模拟分析了泵浦光在Tm∶YAG SCF中的传播模式及强度分布情况。采用1.7μm激光二极管(LD)作为泵浦源进行共振泵浦,将模式匹配和泵浦光导波传输结构相结合,实现了Tm∶YAG SCF连续激光运转,在~2.02μm处获得了7.85 W的功率输出,对应入射泵浦功率的斜效率为46.3%。Objective High-power lasers within the 2-μm spectral range have been utilized in various applications in the fields of laser radar and satellite remote sensing,essentially serving as pump sources for optical parametric oscillators.Tm/Ho-doped fiber lasers are currently the primary methods for achieving high-power continuous-wave lasers or high-average-power pulsed lasers with high repetition rates owing to their homogeneous heat load distribution.However,photon dark effects,nonlinear effects,and transverse mode instability in fibers present as obstacles for further power/energy scaling,particularly for pico-or femtosecond-pulsed lasers.To tackle these challenges in the domain of high-power lasers,the introduction of gain media with novel structures is imperative and constitutes a popular area of research.Single-crystal fibers(SCFs)are long,thin crystalline rods,typically having a diameter of less than 1 mm and length of a few centimeters.Owing to their high thermal conductivities and low Brillouin gain coefficients,SCFs combine the advantages of both bulk crystals and glass fibers.Thus,they are promising candidates for high-power laser systems.SCFs have been showcased as promising candidates for high-average or peak-power laser oscillators and amplifiers within the 1μm spectral region.Nevertheless,research on the laser performance of SCFs in the mid-infrared 2μm spectral range,particularly when doped with Tm3+or Ho3+ions,is limited.Recently,the first Tm∶YAG SCF laser,utilizing a 783-nm pump,was reported.Owing to high quantum defects,the use of near-infrared pumping results in a significant thermal load,thereby limiting its potential for power scalability.However,by directly pumping Tm3+ions into the upper laser level(3H6→3F4),the issue of thermal loading can be effectively addressed,thus paving the way for further power scaling and enhanced laser efficiency.Methods The experimental setup is shown in Fig.1.The pump source is a fiber-coupled laser diode(LD)at 1719 nm,with a maximum output power of 25 W,numer

关 键 词：激光器 固体激光器 共振泵浦 Tm∶YAG单晶光纤 泵浦导波 

分 类 号：O436[机械工程—光学工程]