[1] [1] Zhao X, Tong S, Liu Y, Song Y, Jiang H. Technology on spot detection and tracking based on four-quadrant detector. Chinese Journal of Lasers, 2010, 37(7): 1756-1761

[2] [2] Zhang Z. Spot position detection technology based on QD. Changchun: Changchun University of Science and Technology, 2014, 21-22

[3] [3] Yue B, Yang W, Fu C. Experiments on precision tracking system with a fast steering mirror in space laser communication. Opto- Electronic Engineering, 2002, 29(3): 35-37

[4] [4] Li M, Ai Y, Cao Y. Research of fine tracking servo system for FSO terminal. Laser Technology, 2009, 33(3): 262-265

[5] [5] Shao B, Sun L, Qu D, Wang J, Qin C. Research on the key technology of ATP system for free space optical communication. Piezoelectrics & Acoustooptics, 2005, 27(4): 431-433

[6] [6] Dong R, Ai Y, Xiao Y, Shan X. Design and communication experiment of fine tracking system for free space optic. Hongwai Yu Jiguang Gongcheng, 2012, 41(10): 2718-2722

[7] [7] Zhou H, Ai Y, Shan X, Dai Y. Identification of fine tracking system for free space optical communications. Hongwai Yu Jiguang Gongcheng, 2015, 44(2): 736-740

[8] [8] Xu L. The design of scanning control system based on 2D laser galvanometer. Changchun: Changchun University of Science and Technology, 2012, 13-15

[9] [9] u J. Research of on the determination of the spot position of the four quadrant detector. Technology Trend, 2009, 10(1): 222-224 (in Chinese)

[10] [10] Wei L. The reaserch and realization of APT system for laser space communication system. Wuhan: Huazhong University of Science and Technology, 2010, 39-44

[11] [11] Han C, Bai B, Yang H, Tong S, Jiang H, Fan J. Study four-quadrant detector in the free space laser communication. Chinese Journal of Lasers, 2009, 36(8): 2030-2034

[12] [12] Wang L. Technology research on fine tracking in space laser communication system. Optical Communication Technology, 2014, 3: doi:10.13921/j.cnki.issn1002-5561.2014.03.017

[13] [13] Ke Y. Measurement system design and experimental research with high accuracy for laser beam quality. Wuhan: Huazhong University of Science and Technology, 2015, 16-18