This study presents a method for achieving rapid beam alignment using image calibration at the transmitting end and a two-dimensional mirror control at the receiving end, thus, addressing the problem of long time-consuming beam alignment in traditional wireless optical communication. The image calibration coarse tracking at the transmitting end can ensure that the spot effectively covers the two-dimensional mirror, and the coupling spot coarse tracking at the receiving end can effectively suppress the beam drift caused by atmospheric turbulence; the uplink can be established simultaneously with the downlink. The non-common sight axis control avoids the inconvenience of transmitting control instructions from the receiving end to the transmitting end, and it is not necessary to use a space stable platform for the moving base, which greatly facilitates the promotion of wireless optical communication.
Shangjun Yang, Xizheng Ke, Jiali Wu, Xuguang Liu. Fast Alignment of Wireless Optical Communication Using Two-Dimensional Mirror[J]. Chinese Journal of Lasers, 2022, 49(11): 1106001