机载空间激光通信大气附面层影响及补偿技术研究

The Effect of Atmosphere Boundary Layer on Airborne Space Laser Communication and Its Compensation Technology

随着空间激光通信技术的发展,大气环境对机载空间激光通信的影响越来越突出,大气附面层是其中一个重要的因素。为了研究大气附面层对通信的影响,在机载激光通信试验中观察现象的基础上,从衍射光学理论着手,对试验中存在的附面层影响进行理论上探讨。研究结果表明:大气附面层对空间激光通信的影响,是在系统前附加一个焦距在-530 m的负透镜,造成系统焦距变化,光斑扩散,从而影响通信效果。这种影响可以通过在系统中增加补偿透镜的方式进行补偿,并进行了相应的补偿试验。试验结果表明:大气附面层对空间激光通信的影响,完全可以通过光学方法进行补偿,补偿效果满足空间通信要求,为以后机载空间激光通信的发展奠定了良好基础。

With the development of space laser communications technology, the atmospheric environment has a prominent effect on the airborne space laser communication, and the atmospheric boundary layer is one of the main influencing factors. To study the effect of atmospheric boundary layer on the communica- tion, the influence of the boundary layer is discussed based on the airborne laser communications experi- ment and the theory of diffraction optics. The results show that the effect of atmospheric boundary layer on the space laser communications system is due to attaching a negative lens with focal length of -530 m in front of the system to cause the change of system focal length and the spot diffusion. The effect can be compensated by increasing a compensative lens in the system, and the corresponding compensation tests are carried out. The results show that the effect of the atmospheric boundary layer on the space laser com- munication can be compensated by optical method, and the compensation meets the requirements of space communication.