Phase correction of coherent scalar vortex light beams under turbulence conditions

Vladimir P. Lukin; Peter A. Konyaev; Viktor A. Sennikov

doi:10.1117/12.2583937

20 September 2020 Phase correction of coherent scalar vortex light beams under turbulence conditions

Vladimir P. Lukin, Peter A. Konyaev, Viktor A. Sennikov

Proceedings Volume 11532, Environmental Effects on Light Propagation and Adaptive Systems III; 115320P (2020) https://doi.org/10.1117/12.2583937
Event: SPIE Remote Sensing, 2020, Online Only

Conference Poster

Abstract

The method of computer simulation is used to solve the problem of assessing the distortions of coherent structured light beams (with and without an optical vortex) during their propagation in a randomly inhomogeneous atmospheric medium. The methods of adaptive phase-conjugate correction of the light wave from the reference beacon source are used. Two schemes of an adaptive optical system with a beacon location (at the beginning of the propagation path or at the end of it) are considered. The propagation of focused Laguerre-Gaussian beams is investigated by numerically solving a scalar parabolic wave equation. Initially, all beams are reduced to the same effective radius. A dynamically time-varying randomly inhomogeneous medium with a power-law spectrum characteristic of atmospheric turbulence is modeled by a set of several dynamically changing turbulent phase screens uniformly distributed along the beam propagation path. For this, a dynamic algorithm for simulating a time-varying random environment is used, based on an autoregression model with a moving average. This also makes it possible to study the temporal spectra of fluctuations of the indicated beams under conditions of weak turbulence in cases without the use of preliminary phase correction and with its application.

Citation Download Citation

Vladimir P. Lukin, Peter A. Konyaev, and Viktor A. Sennikov "Phase correction of coherent scalar vortex light beams under turbulence conditions", Proc. SPIE 11532, Environmental Effects on Light Propagation and Adaptive Systems III, 115320P (20 September 2020); https://doi.org/10.1117/12.2583937

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