Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm  

作　　者：Hongxiang Chang Jiachao Xi Rongtao Su Pengfei Ma Yanxing Ma Pu Zhou 常洪祥;奚加超;粟荣涛;马鹏飞;马阎星;周朴(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Optics Letters》2020年第10期43-47,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 61705265 and 61705264);the Innovative Research Groups of Hunan Province(No. 2019JJ10005);the Training Program for Excellent Young Innovators of Changsha (No. KQ1905051)

摘　　要：Coherent beam combining of 60 fiber lasers by using the stochastic parallel gradient descent algorithm has been demonstrated. The functions of pinhole(s) on the power distributions in the far-field have been systematically simulated on both in-phase and out-of-phase modes. Only one photoelectric detector was used to detect the combined power in the far-field central lobe of the in-phase mode state. When the phase controller was in a closed loop, the contrast of the far-field intensity pattern was as high as ~97% with residual phase error of ~λ/30, and ~34.7% of the total power was contained in the central lobe.

关 键 词：coherent bearm combining fiber laser laser arrays 

分 类 号：TN248[电子电信—物理电子学]