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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2300701


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


Author(s):  Lingjing LI, Chunyang MA, Nian ZHAO, Jie PENG, Bin LIU, Haining JI, Yuchen WANG, Pinghua TANG

Affiliation(s):  School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, China; more

Corresponding email(s):   201705710111@smail.xtu.edu.cn, macy15@foxmail.com, nzhao@xtu.edu.cn, jpeng@xtu.edu.cn, liubin@xtu.edu.cn, sdytjhn@xtu.edu.cn, wangyuchen@siom.ac.cn, pinghuatang@xtu.edu.cn

Key Words:  Mid-infrared laser, Fiber laser, Bi-directional pumping


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Lingjing LI, Chunyang MA, Nian ZHAO, Jie PENG, Bin LIU, Haining JI, Yuchen WANG, Pinghua TANG. Numerical study of a bi-directionally in-band pumped dysprosium-doped fluoride fiber laser at 3.2 μm[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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publisher="Zhejiang University Press & Springer",
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Abstract: 
Dy3+-doped fluoride fiber lasers have important applications such as in environmental monitoring, real-time sensing, and polymer processing. At present, achieving a high-efficiency and high-power Dy3+-doped fluoride fiber laser in the mid-infrared (mid-IR) region over 3 μm is a scientific and technological frontier. Typically, Dy3+-doped fluoride fiber lasers utilize 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, intended to address the limitations of output power scaling and to enhance the efficiency of the Dy3+-doped fluoride fiber laser at 3.2 μm, was investigated numerically based on rate equations and propagation equations. The detailed simulation results reveal that the optical-optical efficiency of the bi-directionally in-band pumped Dy3+-doped fluoride fiber laser can reach 75.1%, approaching the Stokes limit. The potential for further improvement of the efficiency of the Dy3+-doped fluoride fiber laser was 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 Dy3+-doped fluoride fiber lasers in the mid-IR regime.

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