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20 February 2018 A new version of Stochastic-parallel-gradient-descent algorithm (SPGD) for phase correction of a distorted orbital angular momentum (OAM) beam
Xiao-li Yin, Jiao-Ling Lin, Huan Chang, Xiao-zhou Cui, Yi-Lin Guo, Huan-Yu Liao, Chun-Yu Gao, Guo-hua Wu, Guang-Yao Liu, Jin-Kun Jiang, Qing-Hua Tian
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Proceedings Volume 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application; 106973B (2018) https://doi.org/10.1117/12.2315106
Event: Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2017, Nanjing, China
Abstract
Atmospheric turbulence limits the performance of orbital angular momentum-based free-space optical communication (FSO-OAM) system. In order to compensate phase distortion induced by atmospheric turbulence, wavefront sensorless adaptive optics (WSAO) has been proposed and studied in recent years. In this paper a new version of SPGD called MZ-SPGD, which combines the Z-SPGD based on the deformable mirror influence function and the M-SPGD based on the Zernike polynomials, is proposed. Numerical simulations show that the hybrid method decreases convergence times markedly but can achieve the same compensated effect compared to Z-SPGD and M-SPGD.
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Xiao-li Yin, Jiao-Ling Lin, Huan Chang, Xiao-zhou Cui, Yi-Lin Guo, Huan-Yu Liao, Chun-Yu Gao, Guo-hua Wu, Guang-Yao Liu, Jin-Kun Jiang, and Qing-Hua Tian "A new version of Stochastic-parallel-gradient-descent algorithm (SPGD) for phase correction of a distorted orbital angular momentum (OAM) beam", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106973B (20 February 2018); https://doi.org/10.1117/12.2315106
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KEYWORDS
Telecommunications
Multiplexing
Adaptive optics
Atmospheric turbulence
Deformable mirrors
Free space optical communications
Zernike polynomials
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