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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

  • Editor: Steven A. Burns
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2645–2660

Fourier transform wavefront control with adaptive prediction of the atmosphere

Lisa A. Poyneer, Bruce A. Macintosh, and Jean-Pierre Véran  »View Author Affiliations


JOSA A, Vol. 24, Issue 9, pp. 2645-2660 (2007)
http://dx.doi.org/10.1364/JOSAA.24.002645


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Abstract

Predictive Fourier control is a temporal power spectral density–based adaptive method for adaptive optics that predicts the atmosphere under the assumption of frozen flow. The predictive controller is based on Kalman filtering and a Fourier decomposition of atmospheric turbulence using the Fourier transform reconstructor. It provides a stable way to compensate for arbitrary numbers of atmospheric layers. For each Fourier mode, efficient and accurate algorithms estimate the necessary atmospheric parameters from closed-loop telemetry and determine the predictive filter, adjusting as conditions change. This prediction improves atmospheric rejection, leading to significant improvements in system performance. For a 48 × 48 actuator system operating at 2 kHz , five-layer prediction for all modes is achievable in under 2 × 10 9 floating-point operations/s.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(070.6020) Fourier optics and signal processing : Continuous optical signal processing

ToC Category:
Atmospheric and oceanic optics

History
Original Manuscript: November 8, 2006
Revised Manuscript: March 21, 2007
Manuscript Accepted: April 18, 2007
Published: July 30, 2007

Citation
Lisa A. Poyneer, Bruce A. Macintosh, and Jean-Pierre Véran, "Fourier transform wavefront control with adaptive prediction of the atmosphere," J. Opt. Soc. Am. A 24, 2645-2660 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-9-2645

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