Xu Jianhua, Wang Xiangru, Huang Ziqiang, Wu Liang, Zhang Tianyi, Tan Qinggui, Wu Shuanghong, Qiu Qi, Xie Wen. PID Tracking Method of Space Laser Communication Based on Liquid Crystal Optical Phased Array[J]. Laser & Optoelectronics Progress, 2017, 54(2): 21202