“…Some work, such as the study of laser communication concept and design of key components of laser communication device, has been done. And we have successfully carried out some tests on data transferring at low and medium speed via laser beam from LEO satellite to GEO satellite, and from LEO satellites to ground segments [5,6] . During the test, our system has successfully achieved results with high connection efficiency, shot capture time, high sensitivity, which ensures a good following and targeting efficiency with resistance for perturbation and relatively high transferring speed.…”