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3 July 2003 Spatially distributed algorithm for mitigation of atmospheric distortions of the laser beam
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Proceedings Volume 4975, Free-Space Laser Communication Technologies XV; (2003)
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vladimir V. Nikulin and Victor A. Skormin "Spatially distributed algorithm for mitigation of atmospheric distortions of the laser beam", Proc. SPIE 4975, Free-Space Laser Communication Technologies XV, (3 July 2003);


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