偏振分集下两个不相关散斑图叠加的空间统计特性
Spatial statistics of superposition of two uncorrelated speckle patterns with polarization diversity
摘要：
本文从理论和实验两方面详细研究了偏振分集不相关散斑图叠加对叠加散斑图空间统计特性的影响。它示出，取决于组成散斑图案的偏振矢量的相互取向，叠加的散斑图案的最大程度的相干性（DoC）和偏振度（DoP）之间的最大值和最小值之间的变化，以正弦的方式。此外，组成散斑图案的平均强度比也被发现影响这些变化。两点强度关联函数的可见度的变化的研究也揭示了正弦性质的变化和它的依赖于平均强度的比率，这被发现是类似的最大DoC和DoP的变化。为了更好地理解对空间统计的影响，还对归一化概率密度函数的变化进行了详细的研究。
英文摘要：
A detailed theoretical and experimental study on the effect of the superposition of uncorrelated speckle patterns with polarization diversity on the spatial statistics of the superposed speckle pattern is presented. It is shown that depending on the mutual orientation of the polarization vectors of the constituent speckle patterns, the maximum degree of coherence (DoC) and degree of polarization (DoP) of the superposed speckle pattern changes between a maximum and minimum value in a sinusoidal fashion. Moreover, the average intensity ratio of the constituent speckle patterns is also found to be affecting these variations. A study of the change in the visibility of the two-point intensity correlation function also reveals a sinusoidal nature of the variation and its dependence on the ratio of the average intensity, which are found to be similar to the variations of the maximum DoC and DoP. A detailed study on the changes in the normalized probability density function is also performed for better understanding of the effect on the spatial statistics.
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