基于自由空间光通信技术的研究

自由空间光通信（FSO）是以大气为传输媒介，以激光的波长作为载体用以携带高速信息的无线传输技术，它是光通信与无线通信的结合，并兼有光纤通信的高速传输与无线通信可灵活移动等优点，无须挖沟，无须申请频率许可证，为当今卫星通信技术的首选。关键技术主要对FSO通信系统中接收灵敏度进行分析以及对接收的光学系统中跟踪原理进行剖析，为进一步提高自由空间光通信的性能作铺垫。

Study on the Free Space-based Optical Communication Technology

Free space optical communication, with the atmosphere as the media and the laser＇s waveform as the information carrier, is a wireless transmission technique that can load the high speed information. It integrates the optical communication and the wireless communication, and has both the fiber＇s high-spend transfer and the wireless＇s flexibility. It is the first choice for modern satellite communication because unnecessary to bury the cable and apply for a license. The key technology is to analyze the receive sensitivity of the free space optical communication system and the tracking principle of the receive optical system, thus laying a foundation for the future development of free space optical communication system.