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自适应光纤耦合器(AFC)是一种可实现高稳定、高效的空间光至光纤耦合的新型自适应光学器件。研究了AFC阵列作为空间激光通信系统接收光端机的可行性。在不同的大气湍流强度下,利用SPGD算法,仿真研究了不同子孔径数AFC阵列的闭环控制过程。研究结果表明,AFC阵列技术可缓解大气湍流影响,改善光纤耦合效率并提高耦合过程的稳定性;当等效接收口径一定时,随着阵列子孔径数的增加,光纤耦合效率及控制算法收敛速率都相应提升。
Adaptive Fiber Coupler (AFC) is a new type of adaptive optics that enables high-stability, efficient spatial light-to-fiber coupling. The feasibility of using AFC array as the receiving optical terminal in space laser communication system is studied. Under different atmospheric turbulence intensities, the closed-loop control process of AFC arrays with different subapertures was simulated by SPGD algorithm. The results show that the AFC array technology can mitigate the influence of atmospheric turbulence, improve the fiber coupling efficiency and improve the stability of the coupling process. When the equivalent receiving aperture is constant, with the increase of array subaperture, the fiber coupling efficiency and the convergence rate of the control algorithm Corresponding promotion.