摘要
We experimentally demonstrated a cascaded internal phase control technique.A laser array with 12 channels was divided into three sub-arrays and a stage array,and phases of the sub-arrays and the stage array were locked by four phase controllers based on the stochastic parallel gradient descent(SPGD)algorithm,respectively.In this way,the phases of the whole array were locked,and the visibility of the interference pattern of the whole emitted laser array in the far field was∼93%.In addition,the technique has the advantage of element expanding and can be further used in the high-power coherent beam combination(CBC)system due to its compact spatial structure.
作者
龙金虎
张嘉怡
常洪祥
常琦
邓宇
杨子鑫
吴坚
粟荣涛
马阎星
马鹏飞
周朴
Jinhu Long;Jiayi Zhang;Hongxiang Chang;Qi Chang;Yu Deng;Zixin Yang;Jian Wu;Rongtao Su;Yanxing Ma;Pengfei Ma;Pu Zhou(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China)
基金
supported by the National Natural Science Foundation of China(Nos.62275272 and 62075242)
the Natural Science Foundation of Hunan Province,China(No.2019JJ10005)
the Training Program for Excellent Young Innovators of Changsha(No.kq2206003)
the Postgraduate Scientific Research Innovation Project of Hunan Province(No.QL20220013).