部分相干光在大气湍流中传输的闪烁指数

实验测量了不同空间相干度的部分相干光在实际大气湍流中传输的闪烁指数。结果表明:随着入射光空间相干度的降低,闪烁随光传输距离增长而增加的趋势变得缓慢,甚至出现减小的情况。此外,与完全相干光的闪烁指数随着径向距离的增加而增加不同,部分相干光的闪烁指数沿着光斑径向距离的增加不一定增加,而有可能出现降低。相干度越低,该效应越明显。

Scintillation index of partially coherent beam propagating through atmospheric turbulence

The scintillation index of partially coherent beam on propagation in atmospheric turbulence is experimentally measured. It is found that the scintillation index of completely coherent beams increases with the increasing of propagation distance in atmospheric turbulence. However, the scintillation index of partially coherent beams may decrease with the increasing of propagation distance. As the correlation length of incident beams becomes shorter, the scintillation index of beams increases more slowly, and even decreases with the increasing of the radial distance.