Analysis of Preliminary Design of System for Free Space Optical Communication

Free space optical communication is a new communication technology in which is promulgated through atmosphere and the laser is used as carrier wave.But the traditional FSO just can provide directional communication and can not communicate when it is moving.In order to overcome this disadvantage,the preliminary design of space laser communication system is given and the functions of every part are introduced in this paper firstly.Then the antenna's design is improved.The APT(Acquisition,Pointing and Tracking) technology and its process are described finally.