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γ射线导致的光子暗化对掺镱光纤激光器效率的影响

Influence of γ Ray Induced Photo Darkening on Efficiency of Ytterbium-Doped Fiber Laser

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摘要

γ射线等高能射线会使掺镱光纤产生暗化效应,降低掺镱光纤激光器长时间运行的可靠性。测量了γ射线辐照总剂量对大模场掺镱光纤的损耗特性,结果表明,待测光纤损耗随辐照总剂量线性增大。基于辐照导致的损耗的测量结果和速率方程模型,研究了辐照损耗产生后具有不同结构参数的激光器的效率变化。结果显示,仅考虑辐照损耗效应时,976 nm泵浦的光纤放大器对辐照附加损耗的敏感性最低;待测光纤最优信号光的中心波长为1070 nm,但是在1060~1100 nm范围内最小与最大效率仅相差2%。本研究从掺镱光纤激光器系统层面开展探索研究,为后续激光器的设计和实际应用提供了参考。

Abstract

High energy radiation such as γ ray induces a darkening effect on Yb-doped fiber (YDF), adversely affecting the reliability of Yb-doped fiber laser (YDFL). In this study, we assess the influence of the total dose of γ ray on the loss of large mode area YDF. The results show that the radiation induced loss (RIL) of the tested fiber linearly increases with the total dose. The optical efficiency of YDFL with different structural parameters after the generation of RIL is then investigated based on the measured value of RIL and rate equation model. The amplifier scheme pumped with 976-nm laser diodes exhibits the least sensitivity to the total dose of γ ray. The optimized central wavelength used herein is 1070 nm for the YDF; however, the efficiency difference is only 2% for wavelengths from 1060 nm to 1100 nm. This paper performs the research based on the YDFL system, providing a reference for further YDFL design and applications.

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中图分类号:O436

DOI:10.3788/LOP57.011406

所属栏目:激光器与激光光学

基金项目:中国博士后科学基金;

收稿日期:2019-07-03

修改稿日期:2019-07-15

网络出版日期:2037-01-01

作者单位    点击查看

张汉伟:上海航天技术研究院宇航系统工程研究所, 上海 201108国防科技大学前沿交叉学科学院, 湖南 长沙 410073
王小林:国防科技大学前沿交叉学科学院, 湖南 长沙 410073
唐峰:上海航天技术研究院宇航系统工程研究所, 上海 201108
刘文广:国防科技大学前沿交叉学科学院, 湖南 长沙 410073
刘鹏宇:上海航天技术研究院宇航系统工程研究所, 上海 201108
许晓军:国防科技大学前沿交叉学科学院, 湖南 长沙 410073
肖余之:上海航天技术研究院宇航系统工程研究所, 上海 201108
陈金宝:国防科技大学前沿交叉学科学院, 湖南 长沙 410073

联系人作者:张汉伟(zhanghanwei100@163.com)

备注:中国博士后科学基金;

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引用该论文

Zhang Hanwei,Wang Xiaolin,Tang Feng,Liu Wenguang,Liu Pengyu,Xu Xiaojun,Xiao Yuzhi,Chen Jinbao. Influence of γ Ray Induced Photo Darkening on Efficiency of Ytterbium-Doped Fiber Laser[J]. Laser & Optoelectronics Progress, 2020, 57(1): 011406

张汉伟,王小林,唐峰,刘文广,刘鹏宇,许晓军,肖余之,陈金宝. γ射线导致的光子暗化对掺镱光纤激光器效率的影响[J]. 激光与光电子学进展, 2020, 57(1): 011406

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