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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 2 — Feb. 1, 2002
  • pp: 356–368

Decoupled stochastic parallel gradient descent optimization for adaptive optics: integrated approach for wave-front sensor information fusion

Mikhail A. Vorontsov  »View Author Affiliations


JOSA A, Vol. 19, Issue 2, pp. 356-368 (2002)
http://dx.doi.org/10.1364/JOSAA.19.000356


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Abstract

A new adaptive wave-front control technique and system architectures that offer fast adaptation convergence even for high-resolution adaptive optics is described. This technique is referred to as decoupled stochastic parallel gradient descent (D-SPGD). D-SPGD is based on stochastic parallel gradient descent optimization of performance metrics that depend on wave-front sensor data. The fast convergence rate is achieved through partial decoupling of the adaptive system’s control channels by incorporating spatially distributed information from a wave-front sensor into the model-free optimization technique. D-SPGD wave-front phase control can be applied to a general class of adaptive optical systems. The efficiency of this approach is analyzed numerically by considering compensation of atmospheric-turbulence-induced phase distortions with use of both low-resolution (127 control channels) and high-resolution (256×256 control channels) adaptive systems. Results demonstrate that phase distortion compensation can be achieved during only 10–20 iterations. The efficiency of adaptive wave-front correction with D-SPGD is practically independent of system resolution.

© 2002 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(110.0110) Imaging systems : Imaging systems

History
Original Manuscript: March 30, 2001
Revised Manuscript: June 14, 2001
Manuscript Accepted: June 14, 2001
Published: February 1, 2002

Citation
Mikhail A. Vorontsov, "Decoupled stochastic parallel gradient descent optimization for adaptive optics: integrated approach for wave-front sensor information fusion," J. Opt. Soc. Am. A 19, 356-368 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-2-356

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