To date, it is a common knowledge that there exists two kinds of turbulence in Earth’s aerosphere, the Kolmogorov turbulence and the non-Kolmogorov turbulence, which has been confirmed by both increasing experimental evidences and some results of theoretical investigations. Therefore, it is necessary to further develop theory of optical wave propagation through the atmospheric turbulence, namely, to study the propagation of laser beams in the non-Kolmogorov turbulence before analyzing the joint influence of the Kolmogorov turbulence and the non-Kolmogorov turbulence on satellite laser communication. Also it is well known that the beam wander results in the performance degradation of satellite laser communication systems and exert an influence on the achievement and stability of its links. In this paper, considering a non-Kolmogorov generalized exponential power spectrum of refractive-index fluctuations, we derive the variances of beam wander for a Gaussian-beam wave in weak turbulence for a horizonal path. This spectrum includes the inner and outer scales with a generalized power law; thus, we also analyze the effect of spectral power law and outer scale variations on the beam wander. It is important to note that the expression for the beam wander variance obtained is concise closed form and independent on the optical wavelength.

中文翻译：

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通过非Kolmogorov湍流大气传播的高斯光束对光束漂移的外尺度效应

迄今为止，众所周知，地球大气层中存在两种湍流，即柯尔莫哥洛夫湍流和非柯尔莫哥罗夫湍流，这已经通过增加的实验证据和一些理论研究的结果得到了证实。因此，有必要进一步发展光波通过大气湍流传播的理论，即在分析柯尔莫哥洛夫湍流和非柯尔莫哥洛夫湍流对卫星的联合影响之前，研究激光束在非柯尔莫哥洛夫湍流中的传播。激光通讯。众所周知，光束的漂移会导致卫星激光通信系统的性能下降，并对其链路的实现和稳定性产生影响。在本文中，考虑到折射率波动的非Kolmogorov广义指数功率谱，我们推导出了在水平湍流弱湍流中高斯光束的光束漂移方差。该频谱包括具有广义幂定律的内部和外部尺度；因此，我们还分析了频谱功率定律和外部尺度变化对光束漂移的影响。重要的是要注意，所获得的光束漂移方差的表达式是简洁的封闭形式，并且与光波长无关。我们还分析了频谱功率定律和外部尺度变化对光束漂移的影响。重要的是要注意，所获得的光束漂移方差的表达式是简洁的封闭形式，并且与光波长无关。我们还分析了频谱功率定律和外部尺度变化对光束漂移的影响。重要的是要注意，所获得的光束漂移方差的表达式是简洁的封闭形式，并且与光波长无关。