Probability distribution of strong intensity fluctuations of vortex laser beams in the turbulent atmosphere
V.P. Aksenov1, V.V. Dudorov1, V.V. Kolosov1,2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Tomsk Scientific Center of the Siberian Branch of the RAS, 634055, Tomsk, av. Akademichesky, 10/4
Keywords: вихревой пучок, турбулентная атмосфера, флуктуации интенсивности, функция распределения вероятностей, vortex beam, turbulent atmosphere, intensity fluctuations, probability density functions
Abstract
Numerical experiment is used to study the distribution laws of intensity fluctuations of laser beams propagating in the atmosphere. The probability density functions of intensity of fundamental Gaussian beam and beam having an orbital angular momentum (vortex beam) are compared for different positions of the observation point in a cross plane. An analytical model is suggested for the probability density function of intensity fluctuations, which works well for the conditions of strong (when the variance of intensity fluctuations takes the highest values) and saturated intensity fluctuations.
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