大功率光纤激光光束合成系统中,由装调误差、热形变效应等引起的光束大指向误差会影响合成效果,并可能对光束合成系统造成严重危害。搭建了2路百瓦量级自适应光纤准直器的光束指向操控实验平台,分别利用基于可变桶中功率评价函数和基于合成光束发散角评价函数的随机并行梯度下降控制策略校正了合成光束间的大指向误差,实现了功率200 W的非相干合成,为大指向误差下的大功率光纤激光合成提供了参考。 In the high-power fiber laser beam synthesis system, the large pointing error of the beam caused by the assembly error, the thermal deformation effect and the like can affect the synthesis effect and may cause serious damage to the beam synthesis system. A beam steering experiment platform of two hundred-watt self-adaptive fiber collimators was set up. By using the power evaluation function based on the variable bucket and the stochastic parallel gradient descent control strategy based on the evaluation function of the divergence angle of the synthesized beam, the synthetic beam Large misalignment between them, realizes the non-coherent synthesis of 200 W power and provides a reference for the synthesis of high power fiber laser with large pointing error.