Shapiro J H
Appl Opt. 1974 Nov 1;13(11):2614-9. doi: 10.1364/AO.13.002614.
Recent studies have used the superposition principle (extended Huygens-Fresnel principle) to characterize completely the statistics of a field that has propagated through a thick slab of turbulent air in terms of the statistics for spherical-wave sources. In this paper, we consider the normal-mode decomposition associated with this linear system propagation model. In particular, we use the statistics of the atmospheric impulse response (Green's function) to show that the atmospheric mode decomposition exhibits far-field and near-field regimes very similar to those of free-space propagation. The significance of these results for optical communication through the atmosphere is briefly discussed.
最近的研究利用叠加原理（扩展的惠更斯 - 菲涅耳原理），根据球面波源的统计特性，完整地表征了通过厚湍空气层传播的场的统计特性。在本文中，我们考虑与此线性系统传播模型相关的简正模式分解。特别是，我们利用大气脉冲响应（格林函数）的统计特性表明，大气模式分解呈现出与自由空间传播非常相似的远场和近场区域。简要讨论了这些结果对于大气光通信的意义。
