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为研究大气湍流作用下不同波长激光信号的传输特性,建立了基于双波长条件下的激光光束传输实验测试系统,在此基础上进行了室外实验测量,得到了双波长光束同信道传输时的光束漂移和光强起伏变化的测试数据。实验结果表明,大气湍流对激光信号的传输具有较大的影响,且光强的闪烁系数与波长有很大的关系,选择波长较长的激光束可减少湍流对光强起伏的影响;光束质心漂移具有很大的随机性,且其质心变化与波长之间无明显的直接联系。实验测试数据结果与大气湍流理论相符合,对空间大气通信具有一定的参考价值。
In order to study the transmission characteristics of laser signals with different wavelengths under atmospheric turbulence, an experimental test system of laser beam transmission based on dual wavelength is established. Based on this, an outdoor experimental measurement is carried out. Drift and light intensity fluctuations in the test data. The experimental results show that the atmospheric turbulence has a great influence on the laser signal transmission, and the scintillation coefficient of the light intensity has a great relationship with the wavelength. Selecting the laser beam with longer wavelength can reduce the influence of turbulence on the light intensity fluctuation. Drift has a great randomness, and there is no obvious direct relationship between the change of centroid and the wavelength. Experimental results of the experimental data are consistent with the theory of atmospheric turbulence and have certain reference value for space atmosphere communication.