级联泵浦高功率掺镱光纤激光器:进展与展望  

Tandem-Pumped High-Power Ytterbium-Doped Fiber Lasers: Progress and Opportunities

作　　者：肖起榕[1,2] 田佳丁 李丹[1,2] 齐天澄 王泽晖 于伟龙 吴与伦 闫平[1,2] 巩马理[1,2] Xiao Qirong;Tian Jiading;Li Dan;Qi Tiancheng;Wang Zehui;Yu Weilong;Wu Yulun;Yan Ping;Gong Mali(Ministry of Education Key Laboratory of Photonics Control Technology,Department of Precision Instruments,Tsinghua University,Beijing 100084,China;State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学精密仪器系光子测控技术教育部重点实验室,北京100084 [2]清华大学精密仪器系精密测试技术及仪器国家重点实验室,北京100084

出　　处：《中国激光》2021年第15期60-80,共21页Chinese Journal of Lasers

基　　金：国家自然科学基金(61875103,61675114,62075113)。

摘　　要：级联泵浦的高功率掺镱光纤激光器在近年快速发展,已经成为获取具有优异光谱特性、高亮度、高功率激光光束的重要技术途径。以高功率1018 nm光纤激光器为代表的高亮度级联泵浦激光源的研究和应用,给包括传统波长掺镱光纤激光、高功率随机光纤激光、拉曼光纤激光在内的众多高功率光纤激光领域带来突破性的性能提升。本文总结回顾了级联泵浦高功率掺镱光纤激光器的最新研究进展,介绍了当前实现高性能输出的级联泵浦高功率光纤激光所应用的主要关键技术,并展望了未来研究的方向和挑战。Significance Ytterbium-doped fiber lasers have gained rapid development in the past two decades.Since the breakthrough of hundred-watt-level power at the end of the last century,nowadays the output power of the fiber lasers can exceed ten-kilowatt level.Thanks to the waveguide nature of optical fibers and the laser diode pumping techniques,high-power ytterbium-doped fiber laser owns several advantageous features,including high conversion efficiency,high beam brightness,compact and flexible architecture,easy thermal management,and stable operation.High-power ytterbium-doped fiber lasers have become preferred laser sources for many applications in various fields,such as industrial manufacturing,biomedical treatment,scientific researches,and defense.Technologies for improving the output characteristics of high-power ytterbium-doped fiber lasers,especially for scaling output power,realizing more control of the output spectrum and expanding the range of output wavelengths,have received considerable interests from the fields.The characteristics are influenced by pumping schemes of the lasers,of which there are two major kinds as direct pumping and tandem-pumped.Direct pumping generally means that fiber lasers are pumped by laser diodes,which usually emit at around 915 nm and 976 nm for ytterbium-doped fibers(YDFs).In contrast,tandem-pumped means that fiber lasers are pumped by other fiber lasers,of which the wavelength generally ranges from 1000 nm to 1030 nm.Both pumping schemes have demonstrated high capability for realizing high-performance ytterbium-doped fiber lasers,and have realized outstanding advances in increasing power and brightness,controlling output spectrum,and expanding the available range of output wavelength.Particularly,tandem-pumped scheme has achieved increasing performance from recent studies.A few 20 kW fiber lasers have been proposed in the last several years.Owing to the rapid development of light sources such as laser diodes,direct pumping has been the majority of the adopted pumping schemes.H

关 键 词：激光器 高功率光纤激光器 级联泵浦 1018 nm光纤激光器 随机光纤激光 拉曼光纤激光 

分 类 号：O436[机械工程—光学工程]