中文说明：应用背景自由空间光通信（FSO）是一种光学技术涉及到数据通信透过空气介质发射调制的可见光或红外线光束。不像传统的铜线或光纤，传输信号在玻璃或线，发出的光信号通过通信大气信道获得通信从源到目的地；关键技术混合FSO/RF通信系统是一个免费的、高带宽的接入技术， ；为各种应用，引起了人们极大的关注，如最后一公里连接， ；光纤的备份，和企业连接。
English Description：
Application backgroundFree space optics (FSO) is an optical technology which involves data communication by transmitting modulated visible or infrared beams through air medium. Unlike traditional copper wires or fiber-optic, which transmit signals across glass or wire, FSO sends optical signals through atmosphere channel to obtain communication from source to destination. Key TechnologyHybrid FSO/RF system is a license-free and high-bandwidth access technique, which has attracted significant attention for a variety of applications, such as last mile connectivity, optical fiber backup, and enterprise connectivity.