With the Continuous development of Information transmission and switching technology, Space laser communication technologies become a field of optical communications research focus. Space laser communication technologies have the advantages of high information content, high transfer rate and strong confidentiality channel. 随着信息传输和交换技术不断的飞跃发展,空间激光通信技术以其信息容量大、传输速率高、信道隐蔽性好等一系列优点,成为当今光通信领域的一个研究热点。