大气湍流对激光信号传输影响的研究

Reseach on the Laser Beam Through Turbulence Atmosphere Channel

在不同的大气条件下,分析和研究了大气湍流对激光信号传输时所产生的强度起伏、光束漂移、扩展和相位起伏及到达角起伏等现象,并在此基础上设计了相应的实验方案,对各种效应进行了具体测试。实验结果表明,随机大气信道湍流效应对激光信号传输的影响很大,在不同的条件下,大气湍流效应的不同影响程度、湍流的强弱与阳光的强烈程度有关。晴天中午前后最强,其他时间较弱。这为激光大气通信在大气湍流效应方面提供了一定的依据。

In laser atmosphere communication technology, the characteristics of the atmosphere channel are very important for the communication system. Atmosphere turbulence causes the undulation of beam intension, the dithering and spreading of beam, etc. These affects of turbulence are analyzed and an experiment system is designed. The experiment results are given and discussed.