基于光纤合束器件的高功率全光纤相干合成技术研究进展与展望  

Research progress and prospect of high power all-fiber coherent beam combination based on fiber combining devices

作　　者：闫玥芳 陶汝茂 刘玙 李雨薇[1] 张昊宇[1] 楚秋慧 李敏[1] 舒强 冯曦[1] 黄文会[2] 景峰[1] Yan Yuefang;Tao Rumao;Liu Yu;Li Yuwei;Zhang Haoyu;Chu Qiuhui;Li Min;Shu Qiang;Feng Xi;Huang Wenhui;Jing Feng(Laser Fusion Research Center,CAEP,Mianyang 621900,China;Key Laboratory of Particle&Radiation Imaging of Ministry of Education,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]清华大学工程物理系粒子技术与辐射成像教育部重点实验室,北京100084

出　　处：《强激光与粒子束》2023年第4期59-72,共14页High Power Laser and Particle Beams

摘　　要：介绍了目前研究中相干合成多采用空间结构的研究现状,分析了空间结构的相干合成方案需要复杂的光路调节且长时间工作稳定性欠缺,肯定了基于光纤合束器件的全光纤激光相干合成在相干合成光源中的稳定性与实用性,梳理了近年来基于光纤合束器件的全光纤激光相干合成方案,分别介绍了基于光纤耦合器、光子灯笼、相干信号合束器以及基于自成像效应实现全光纤合束的技术方案及研究现状,分析了不同光纤器件目前的主要限制因素和发展瓶颈,并展望了未来的发展方向。The output power of high-power single fiber laser is limited by various physical effects,and it is difficult to achieve a breakthrough in the short term.Coherent beam combination(CBC)of fiber lasers is an effective technical solution to break the power limit of single fiber laser and achieve higher output power.This paper introduces the status quo of CBC research,which mostly uses free-space structure.It is analyzed that the CBC scheme of spatial structure requires complex optical adjustment,and suffers the problem of long-term drifting.The all-fiber coherent beam combination based on all-fiber combining device can enhance the stability and practicability of the combining laser source,and the recent development of CBC in all-fiber format is reviewed in detail.The combining schemes and research status based on fiber coupler,photon lantern,coherent signal combining device and all-fiber device of self-imaging effect are introduced respectively.The main limiting factors and development bottlenecks of different fiber devices are discussed,and the future development prospects are analyzed.

关 键 词：相干合成 高功率光纤激光 全光纤 光束质量 

分 类 号：O436[机械工程—光学工程]