Elementary Study of Turbulence Effects Resulted from Laser Propagation in the Atmosphere Based on the Stochastic Parallel Gradient Descent Algorithm

Abstract

Abstract:

Stochastic parallel gradient descent (SPGD) is a developing model-free optimum control algorithm in recent years, which is being used for adaptive optics system for its advantages of inexpensive cost, beacon-free and so on. Laser propagation through atmosphere is simulated by the method of phase-screens, 61-elements deformable mirror is used as corrector, and the aberration caused by turbulence effects is corrected by SPGD algorithm. The numerical simulation results show that SPGD algorithm can be used for adaptive optics system to correct the aberration caused by turbulence effects, the different perturbation amplitudes and gain coefficients are very important for the last corrected results, and the numerical simulation results on different propagation conditions are also shown.

Key words: adaptive optics, stochastic parallel gradient descent algorithm, deformable mirror

CLC Number:

TN012

FAN Ling, JIAO Chun-Hong, FENG Xiao-Xing, MA Hui-Min, FAN Cheng-Yu. Elementary Study of Turbulence Effects Resulted from Laser Propagation in the Atmosphere Based on the Stochastic Parallel Gradient Descent Algorithm[J]. Journal of Atmospheric and Environmental Optics, 2009, 4(3): 183-189.

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