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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 30 — Oct. 20, 2007
  • pp: 7566–7572

Optimizing stochastic gradient descent algorithms for serially addressed adaptive-optics wavefront modulators

Travis Simpkins, Jeremy Hui, and Cardinal Warde  »View Author Affiliations


Applied Optics, Vol. 46, Issue 30, pp. 7566-7572 (2007)
http://dx.doi.org/10.1364/AO.46.007566


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Abstract

High-resolution adaptive-optical systems with thousands to millions of pixels will most likely have to employ serial- or matrix-addressed spatial light modulators (e.g., microelectromechanical-system-on-VLSI spatial light modulators). We compare parallel gradient descent adaptive-optics algorithms with serial gradient descent algorithms running on serially addressed modulators. While serial algorithms have previously been shown to require more iterations than parallel algorithms, we show that, because of the limitations of the databus, each serial iteration of the algorithm on a serial modulator requires significantly less time to complete than a parallel iteration, thereby favoring the serial algorithm when time to convergence is used as the performance metric. Thus, such high-resolution serially addressed devices are generally better matched to the serial-update wavefront correction algorithm owing to the data load penalty imposed by the bandwidth-limited databus of these modulators.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(220.4830) Optical design and fabrication : Systems design

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: April 26, 2007
Revised Manuscript: August 14, 2007
Manuscript Accepted: August 28, 2007
Published: October 18, 2007

Citation
Travis Simpkins, Jeremy Hui, and Cardinal Warde, "Optimizing stochastic gradient descent algorithms for serially addressed adaptive-optics wavefront modulators," Appl. Opt. 46, 7566-7572 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-30-7566


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