Abstract
We derive analytical expressions of the kurtosis (K) parameter and the coupling (C) coefficient of the partially-coherent twisted Gaussian (PCTG) beam propagating through non-Kolmogorov atmospheric turbulence, which can be given by the initial second-order moments and fourth-order moments of the Wigner distribution function for the PCTG beam at the source plane. Numerical results indicate that for the smaller generalized structure parameter, larger generalized exponent parameter, inner scale and outer scale, the K parameter and the C coefficient of the PCTG beam are less affected by the turbulence. It also can be found that the PCTG beam with larger twisted factor and smaller waist width and initial coherent lengths can resist the effect of turbulence more effectively. We also find that the coupling properties of the PCTG beam in turbulence are only caused by the turbulence. Therefore, our results can provide reference for detecting the related parameters of atmospheric turbulence.
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Xu, Y., Xu, Y., Wang, S. et al. Kurtosis Parameter and Coupling Coefficient of Partially-Coherent Twisted Gaussian Beam Propagating Through Non-Kolmogorov Atmospheric Turbulence. J Russ Laser Res 43, 509–519 (2022). https://doi.org/10.1007/s10946-022-10077-8
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DOI: https://doi.org/10.1007/s10946-022-10077-8