利用CCD研究激光束在大气随机信道中的传输特性

介绍了无线光通信系统中激光信号通过随机大气信道时，由于激光与大气介质的相互作用．对光信号产生的散射、吸收和湍流等效应。上述一系列效应对激光信号的传输产生巨大的影响、其中最为重要的影响效应有衰减、光束闪烁及抖动效应。通过一实验装置、利用CCD对通过大气信道的光束在不同能见度、不同大气条件和不同时刻等条件下对激光传输信号的图像的拍摄及所拍摄的图像的对比分析，验证了理论分析中的各种大气随机信道的效应。

The Study for Laser Beam Transmission Character in Atmosphere Rondom Channer by Using CCD

Some effects that affect the transmission in atmosphere of laser signals are introduced. Some phenomena, such as the absorption, dispersion and onflow of aerosol, dust, frog, rain and haze, are engendered by the interaction of laser and atmosphere when the former goes through the latter. These all will produce some other effects that would strongly affect the transmission of laser signals, especially attenuation,coruscation and dithering of beam. They can be experimentally validated through a set of device besides CCD that can shoot and analyze the images of laser signals on conditions of different visibility,atmosphere and time.