The comparative numerical and analytical analysis of scintillation indices ofthe vortex Laguerre-Gaussian beam and the non-vortex doughnut hole and Gaussianbeams propagating in the randomly inhomogeneous atmosphere has been performed.It has been found that the dependence of the scintillation index at the axis ofthe optical vortex on the turbulence intensity at the path has the form of aunit step. It has been shown that the behavior of scintillations in the crosssections of vortex and non-vortex beams differs widely.
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