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Proceedings Paper

Spatially distributed algorithm for mitigation of atmospheric distortions of the laser beam
Author(s): Vladimir V. Nikulin; Victor A. Skormin
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Paper Abstract

Development of long-range laser communication devices capable of operating within Earth's atmosphere is a challenging task. Turbulence effects cause changes of the refractive index, thus creating random redistribution of optical energy in the spatial domain and imposing performance limitations on the laser systems. A mathematical model describing effects of turbulence on the optical wave propagation, based on the Rytov approximation, is presented. A common method of mititaging these effects suggest dynamic wavefront control of the laser beam. In our approach this goal is achieved by placing an adjustable electrically addressed spatial light modulator in the transmitter output. A novel spatially distributed gradient minimization scheme is developed for calculating the required phase profiles. The resultant system is implemented in a simulation setup and tested for convergence, speed, robustness and the ability to reduce the scintillation effect. The paper presents the basic algorithm and dmeonstrates the results of its application.

Paper Details

Date Published: 3 July 2003
PDF: 11 pages
Proc. SPIE 4975, Free-Space Laser Communication Technologies XV, (3 July 2003); doi: 10.1117/12.478935
Show Author Affiliations
Vladimir V. Nikulin, Binghamton Univ. (United States)
Victor A. Skormin, Binghamton Univ. (United States)

Published in SPIE Proceedings Vol. 4975:
Free-Space Laser Communication Technologies XV
G. Stephen Mecherle, Editor(s)

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