Free-space laser communication and its key technology

By Comparison with microwave communication,the advantages of the free-space laser communication system,such as big capacity,low power consumption,small volume and light weight,are introduced.The basic principle of the space laser communication is described.The key technologies in high-power light source,anti-jamming high sensitivity optical signal receiving,fast and precision capture,tracking and aiming of communication link in the space laser communication system,are put forward emphatically.The free-space laser communicationcan find wide applications in military and commercial fields and it has a great potential.