短距离无线激光通信系统波长选择分析

Analysis of wavelength selection for short-range wireless laser communication systems

无线激光通信系统中激光调制信号在大气信道中传输时受背景光、大气衰减、湍流效应等诸多因素的影响.传统上认为红外波段的激光更适合于在大气信道中传输.基于对红光激光束大气传输特性的分析,讨论了激光束传输过程中背景光干扰、大气衰减和湍流效应的影响.结果表明:红光波段激光和红外波段激光用于短距离无线激光通信时受信道的影响差别不大,红光波段激光可用以加载调制信号有望实现无线高速数据传输.

In wireless laser communication links, modulated laser signals can be affected by many factors such as ambient light, attenuation, scintillation while transmitting in the atmospheric channel. Infrared laser radiation is supposed to propagate well in the atmospheric channel. Based on analysis on transmission property of red laser beam, impact from background light, attenuation and scintillation are discussed. It is shown that there is little difference between red and infrared laser concerning affection by atmospheric channel while serving in short-range wireless systems. Red laser can be modulated and is expected to providing wireless high data links.