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

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Abstract

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.

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DOI:10.3788/COL202018.101403

所属栏目:Lasers and Laser Optics

基金项目:This work was supported by the National Natural Science Foundation of China (Nos. 61705265 and 61705264), the Innovative Research Groups of Hunan Province (No. 2019JJ10005), and the Training Program for Excellent Young Innovators of Changsha (No. KQ1905051).

收稿日期:2020-05-12

录用日期:2020-06-28

网络出版日期:2020-08-28

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常洪祥:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
奚加超:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
粟荣涛:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
马鹏飞:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
马阎星:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
周朴:College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China

联系人作者:周朴(zhoupu203@163.com)

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

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引用该论文

Hongxiang Chang, Jiachao Xi, Rongtao Su, Pengfei Ma, Yanxing Ma, Pu Zhou, "Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm," Chinese Optics Letters 18(10), 101403 (2020)

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