Chinese Optics Letters, 2020, 18 (10): 101403, Published Online: Sep. 3, 2020   

Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm Download: 791次

Author Affiliations
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
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.

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[J]. Chinese Optics Letters, 2020, 18(10): 101403.

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