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Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm [Early Posting]

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摘要

Coherent beam combining (CBC) of 60 fiber lasers by using stochastic parallel gradient descent (SPGD) 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 in-phase mode state. When the phase controller was in 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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作者单位:

    National University of Defense Technology
    National University of Defense Technology
    School of optoelectronics, National University of Defense Technology, Room203

引用该论文

Chang Hongxiang,Xi Jiachao,Su RongTao,Ma Pengfei,Ma Yanxing,Zhou Pu. Efficient phase-locking of 60 fiber lasers by stochastic parallel gradient descent algorithm[J].Chinese Optics Letters,2020,18(10):10.