Atmospheric Channel Affecting To Wireless-Laser Communication

Along with the development of the technology and the age of research of advanced communicate electronic facility adapt to space optical communication. Wireless optical communication again turn into one of developed aspect of the next generation. Wireless optical communication near to the earth using to meet Broad Band, it is available method to settle the "last mile" . And that satellite laser communication is considered the single way to solve the bottle-neck in the system of space communication. But in practical, it is very important to study the characteristic of atmospheric random channel. This paper introduce the effect of atmospheric random channel to wireless laser communication and light transmit and receive correspond to wireless optical communication after collect and refer to abundance literature information, learning correlated principle of atmospheric laser communication. In addition, we research atmospheric refraction influence to space-earth satellite communication, and put forward that amending emission angle can eliminate excursion between beam and satellite. This idea has emphasis theoretic and practical significance to practical system. At last, real time observation and note of far field pattern of semiconductor laser throughing atmospheric transmit by experiment. Simulating the predigest model using MATLAB and compared the result to experimental ones. Amending the model by experimental result. Also we measure atmospheric attenuation in typical weather and understand it effect to wireless optical communication by sensibility.