STUDY OF THE PROPAGATION OF AN OPTICAL VORTEX ALONG A SHELTERED ATMOSPHERIC PATH

The dynamics of propagation of an optical vortex through an artificial sheltered atmospheric path is considered. The method of generation of optical beams with a nonzero orbital angular momentum by means of a liquid-crystalline HoloEye lC-2002 light modulator is demonstrated, various methods of detection of optical vortices are tested, including shift interferometers of various configurations and the Shack–Hartmann wavefront sensor. The distance at which the structure of the vortex bundle decays for the technically possible under the conditions of the aperture stand of the receiving interference system is determined. The results of experimental studies of beam sizes at different distances are presented. Calculations of the beam divergence angle and the singularity of the optical vortex are performed as a function of the length of the atmospheric path. The influence of the turbu-lent medium on the ability of the receiving system to register an optical vortex is considered.

Authors: V. Yu. Venediktov, K. N. Gavrileva, A. V. Gorelaya, A. A. Sevrugin, E. V. Shubenkova, D. I. Dmitriev, A. D. Tsvetkov

Direction: Instrument Engineering and Information-Measurement Technologies

Keywords: Optic vortex, atmospheric route, angle of divergence, topological charge, turbulence, singularity

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