The Semiconductor Laser Through The Atmosphere Of Channel Two-dimensional Real-time Display And Research

With the development of The Information Technology. The Optical Wireless Communications will become a hot pot in the studying of The Space Communication Network and The Information Superhighway for it抯 high capacity, wide band, good security and so on. Many countries have paid attention to it. In near ground optical communication, atmosphere affects the propagation of laser, so we must make a study of the space channel characteristics. This paper is mainly study of the atmospheric influence on the laser transmission for its stochastic behavior. We analyze the scatter. absorption and turbulence of atmosphere. and calculate the atmosphere attenuation ratio by visibility, and we establish the propagation model of laser in the atmosphere. then simulate the scintillation and wander of the laser beam. The real-time display system is introduced which can be used to measure the wander and scintillation of the laser beam. We made some experiments in the sunny days and the foggy days, the experimental results are discussed in the fifth chapter. At last, we give advice for the future work.