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Inner scale effect on scintillation index of flat-topped beam in non-Kolmogorov weak turbulence

机译:内尺度对非Kolmogorov弱湍流中平顶光束闪烁指数的影响

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摘要

A simpler generalized expression of irradiance fluctuation for flat-topped beams is presented based on the Born and Rytov perturbation methods. The theoretical expression of the on-axis scintillation index in non-Kolmogorov weak atmospheric optics links is developed using the generalized von Karman spectrum model, and using the equivalent structure constant that is different for all power-law exponents. The effect of the inner scale on the on-axis scintillation index is examined comprehensively. It is observed that flat- topped beams happen to possess smaller scintillation indices at larger inner scale. The effects of the power law, flat-topped order, source size of the fundamental Gaussian beam, propagation distance, and wavelength are also analyzed. (C) 2015 Optical Society of America
机译:基于Born和Rytov摄动方法,给出了平顶光束辐照度波动的简单表示。使用广义von Karman光谱模型,并使用对于所有幂律指数均不同的等效结构常数,开发了非Kolmogorov弱大气光学链路中轴闪烁指数的理论表达式。全面检查了内标度对同轴闪烁指数的影响。可以看出,平顶光束恰好在较大的内部尺度上具有较小的闪烁指数。还分析了幂律,平顶阶,基本高斯光束的源大小,传播距离和波长的影响。 (C)2015年美国眼镜学会

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