甚多孔径光纤激光相控阵的光束扫描特性研究  

Research on beam steering of numerous subaperture fiber laser phased array

作　　者：周鑫 邹凡 姜佳丽 李枫[1,2] 耿超[1,2] 李新阳[1,2] Zhou Xin;Zou Fan;Jiang Jiali;Li Feng;Geng Chao;Li Xinyang(Key Laboratory of Adaptive Optics,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院自适应光学重点实验室,四川成都610209 [2]中国科学院光电技术研究所,四川成都610209 [3]中国科学院大学,北京100049

出　　处：《光电工程》2022年第7期28-41,共14页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(62175241,U2141255,62005286)。

摘　　要：甚多孔径光纤激光阵列是构建大功率、高光束质量、等效光学大口径的新兴技术手段之一,而基于相位精密操控实现阵列激光束的共相,乃至快速、灵活的光束偏转是当前光纤激光相控阵技术面向应用的关键。本文将光学相控扫描技术与光纤激光相干合成系统相结合,研究了甚多孔径光纤激光相控阵的光束扫描特性,通过改变准直激光阵列相邻子孔径间的相位差实现了光束扫描。对比分析了19、133、703孔径光纤激光相控阵的远场扫描光束形态分布特征,据此定义并计算了扫描极限范围。该结果为后续开展光纤激光相控阵在长程传输下精确指向控制实验研究提供了理论依据。Numerous sub-aperture fiber laser array is one of the emerging technologies to build high power,high beam quality and equivalent optical large aperture.Realizing the common phase and even the fast and flexible beam deflection of array laser beam based on the precise phase control is the key to the application of the current fiber laser phased array technology.In this paper,the optical phase-controlled steering technology is combined with the fiber laser coherent combining system,and the beam steering characteristics of the numerous sub-aperture fiber array laser coherent combining systems are studied.The beam steering is realized by changing the phase difference between the adjacent sub-aperture of the collimated laser array.The far-field steering beam pattern distribution characteristics of 19,133 and 703 aperture fiber laser phased arrays are compared and analyzed,and the steering limit range is defined and calculated accordingly.The results provide a theoretical basis for the subsequent experimental research on the precise pointing control of fiber laser phased arrays under long-range transmission.

关 键 词：光纤激光相控阵 光束扫描 甚多孔径 相位操控 

分 类 号：TN820.2[电子电信—信息与通信工程]