Numerical study of a bi-directional in-band pumped dysprosium-doped fluoride fiber laser at 3.2μm  

作　　者：Lingjing LI Chunyang MA Nian ZHAO Jie PENG Bin LIU Haining JI Yuchen WANG Pinghua TANG 

机构地区：[1]School of Physics and Optoelectronics,Xiangtan University,Xiangtan 411105,China [2]Research Center of Circuits and Systems,Peng Cheng Laboratory,Shenzhen 518055,China [3]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201899,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2024年第7期1017-1024,共8页信息与电子工程前沿（英文版）

基　　金：the Hunan Provincial Natural Science Foundation of China(Nos.2023JJ30596 and 2022JJ30556);the Scientific Research Fund of Hunan Provincial Education Department,China(No.21B0136);the National Natural Science Foundation of China(No.62105209);the Shanghai Pujiang Program,China(No.22PJ1414900);the Shenzhen Government’s Plan of Science and Technology,China(No.RCYX20210609103157071)。

摘　　要：Dy^(3+)-doped fluoride fiber lasers have important applications in environment monitoring,real-time sensing,and polymer processing.At present,achieving a high-efficiency and high-power Dy^(3+)-doped fluoride fiber laser in the mid-infrared(mid-IR)region over 3μm is a scientific and technological frontier.Typically,Dy^(3+)-doped fluoride fiber lasers use a unidirectional pumping method,which suffers from the drawback of high thermal loading density on the fiber tips,thus limiting power scalability.In this study,a bi-directional in-band pumping scheme,to address the limitations of output power scaling and to enhance the efficiency of the Dy^(3+)-doped fluoride fiber laser at 3.2μm,is investigated numerically based on rate equations and propagation equations.Detailed simulation results reveal that the optical‒optical efficiency of the bi-directional in-band pumped Dy^(3+)-doped fluoride fiber laser can reach 75.1%,approaching the Stokes limit of 87.3%.The potential for further improvement of the efficiency of the Dy^(3+)-doped fluoride fiber laser is also discussed.The bi-directional pumping scheme offers the intrinsic advantage of mitigating the thermal load on the fiber tips,unlike unidirectional pumping,in addition to its high efficiency.As a result,it is expected to significantly scale the power output of Dy^(3+)-doped fluoride fiber lasers in the mid-IR regime.

关 键 词：Mid-infrared laser Fiber laser Bi-directional pumping 

分 类 号：TN248[电子电信—物理电子学]