激光相干合成的研究进展:2011—2020  

Review of Coherent Laser Beam Combining Research Progress in the Past Decade

作　　者：周朴[1] 粟荣涛 马阎星 马鹏飞 吴坚 李灿 姜曼 Zhou Pu;Su Rongtao;Ma Yanxing;Ma Pengfei;Wu Jian;Li Can;Jiang Man(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha Hunan 410073 China)

机构地区：[1]国防科技大学前沿交叉学科学院,湖南长沙410073

出　　处：《中国激光》2021年第4期26-53,共28页Chinese Journal of Lasers

基　　金：国家自然科学基金(62035015);湖南省自然科学基金创新研究群体项目(2019JJ10005)。

摘　　要：本文回顾了过去10年激光相干合成领域取得的重要进展,总结了可合成激光模块性能提升的标志性成果,梳理了相干合成使能技术取得的重要突破,展示了不同类型激光相干合成取得的成果及其多样化应用,并对激光相干合成领域的发展进行了展望。Significance Coherent beam combining(CBC)of lasers is an effective technical approach for scaling the power of a laser while maintaining good beam quality.In 2009,Northrop Grumman Aerospace Systems demonstrated the world′s first 100 kW solid-state laser system,in which seven 15 kW master oscillator-power amplifier laser chains were coherently combined.It was an important milestone in the history of laser development.In the past 10 years(2011—2020),CBC has developed rapidly,and many representative results have been produced.In this paper,the research progress of coherent laser beam combining in the past decade is reviewed.Progress First,the output power of fiber,solid-state,and semiconductor lasers has increased significantly,which has provided high-power combinable laser elements for CBC systems.For example,the output power levels of singlefrequency and narrow-line-width fiber lasers have reached 500 W and 4 kW,respectively;the average power of femtosecond fiber lasers has exceeded 1 kW;and Nd∶YAG and Yb∶YAG solid-state lasers have both generated over20 kW in output power.Second,enabling technologies for coherent laser beam combining have been developed,including phase control,tip-tilt control,polarization control,optical path difference control,high-order aberration control,and aperturefilling.More than 100 fiber lasers have been phase-locked based on active phase control technology.High-power adaptive fiber optic collimators have been designed that can be used for tip-tilt control of fiber lasers with kilowattlevel output power.Active polarization control of a kilowatt-level fiber amplifier has been realized,which has been employed to increase the combination efficiency of CBC systems.High-precision optical path difference real-time control systems have been designed and used for CBC of broad-spectrum and ultrafast lasers.Mode control technologies and adaptive optics methods have been employed for flexible mode manipulation.Aperture-filling technologies,such as microlens arrays,diffractive optical eleme

关 键 词：激光器 相干合成 高能激光 光纤激光 固体激光 半导体激光 

分 类 号：O436[机械工程—光学工程]