Suppression of the influence of atmospheric turbulence during the propagation of a twisted Laguerre-Gaussian correlated beam

During its propagation in atmospheric turbulence, the optical properties of a laser beam will be changed by the surrounding environment. Compared with a completely coherent laser, a partially coherent laser can more strongly resist the influence of atmospheric turbulence. In this paper, a twisted Laguerre-Gaussian correlated beam was employed to deduce a cross-spectral density function for propagation in atmospheric turbulence. The cross-spectral density and M-2 factor were also constructed by using the extended Huygens-Fresnel diffraction integral principle, Wigner distribution function, basic properties of the twisted phase, and power spectrum model of non-Kolmogorov turbulence. Then, the influence of atmospheric turbulence on the beam was numerically simulated, and the results were compared with those for different twist factors, transverse coherence parameters and mode orders. It has been demonstrated that a beam with a high twist factor, low transverse parameter, and high mode order can be used to effectively suppress the influence of atmospheric turbulence.

Automated summary

This paper investigates the influence of atmospheric turbulence on the optical properties of a laser beam, using a twisted Laguerre-Gaussian correlated beam to derive the cross-spectral density function for propagation. Numerical simulations and comparisons with different parameters show that a beam with high twist factor, low transverse parameter, and high mode order can effectively suppress the impact of atmospheric turbulence.