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卫星激光通信需要进行端机远场模拟及远场测试技术研究。在室内短距离模拟远场分布的测试系统中,可以采用透镜变换,在透镜焦平面处得到远场分布。实际测试时引入点光源及平面反射镜,保证焦面位置确定的准确性。模拟卫星激光通信端机平行出射光的远场光斑,经实验检测,光斑第一、二、三级暗纹直径与远场光斑理论值比较的相对误差均小于5%。这表明,该方案可以准确模拟和测试端机远场。该研究工作对卫星激光通信捕捉概率的研究、通信研究、光链路功率的实测核准以及端机性能的整体评估有重要意义。
Satellite laser communications need to carry out the far-end simulation and far-field test technology research. In indoor test systems that simulate far-field distribution over short distances, lens transformation can be used to obtain far-field distribution at the focal plane of the lens. The actual test point light source and plane mirror, to ensure the accuracy of the focal plane to determine the location. The experimental results show that the relative errors of the first, second and third obtrusive patterns of the spot are far less than 5% compared with the theoretical values of the far-field spot. This shows that the program can accurately simulate and test terminal far field. The research work on the satellite laser communication capture probability of research, communication research, optical link power measurement and approval and end machine performance evaluation of the overall significance of.