光学技术, 2019, 45 (4): 486, 网络出版: 2019-09-02
激光相干合成系统中SPGD算法的自适应优化
An adaptive optimization of SPGD algorithm for laser coherent combining system
激光技术 随机并行梯度下降算法 光纤激光阵列 相干合成 自适应增益 laser techniques stochastic parallel gradient descent algorithm fiber laser array coherent beam combination adaptive gain
摘要
激光相干合成技术是目前最常用的实现高功率激光输出的方式, 各路光束间的相位不一致是影响相干合成效果的重要因素。研究了用于控制相位的SPGD算法, 探讨了SPGD算法的参数优化方法, 提出了一种自适应增益策略, 并通过仿真分析了固定增益和自适应增益算法的收敛速度、收敛精度。仿真结果表明, 通过算法参数的优化选取和自适应增益方法, 能够将算法的收敛速度提高12.7%, 收敛精度提高0.23%, 得到了较好的收敛效果。
Abstract
Laser coherent combining technology is the most commonly way to achieve high-power laser. The phase difference between the beams is an important influence factor of the coherent combining. The SPGD algorithm for phase control is studied. The parameter optimization method of SPGD algorithm is discussed, and an adaptive gain strategy is proposed. The convergence speed and precision of the fixed gain and adaptive gain algorithm are analyzed by simulation. The simulation results show that the convergence speed of the algorithm is improved by 12.7% and the convergence precision is improved by 0.23% when using the optimization of the algorithm parameters and the adaptive gain method.
雷婕妤, 孙鑫鹏, 李晔, 史俊锋, 杨振, 马长正, 尹聿海, 王彤璐. 激光相干合成系统中SPGD算法的自适应优化[J]. 光学技术, 2019, 45(4): 486. LEI Jieyu, SUN Xinpeng, LI Ye, SHI Junfeng, YANG Zhen, MA Changzheng, YIN Yuhai, WANG Tonglu. An adaptive optimization of SPGD algorithm for laser coherent combining system[J]. Optical Technique, 2019, 45(4): 486.
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