Research present situation of LWIR free-space laser communication technology

It is known propagation properties of 8～14μm long-wave infrared(LWIR) laser are better than commonly used near-infrared laser in the atmosphere,LWIR free-space laser communications technology become the research focus.This paper should characterize with performance to adverse meteorological conditions when compared with the systems operating in the near IR.The international and domestic situation about LWIR free-space laser communications technology is introduced,and then key technologies of the system are described.