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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: Franco Gori
  • Vol. 31, Iss. 1 — Jan. 1, 2014
  • pp: 101–113

Static and predictive tomographic reconstruction for wide-field multi-object adaptive optics systems

C. Correia, K. Jackson, J.-P. Véran, D. Andersen, O. Lardière, and C. Bradley  »View Author Affiliations


JOSA A, Vol. 31, Issue 1, pp. 101-113 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000101


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Abstract

Multi-object adaptive optics (MOAO) systems are still in their infancy: their complex optical designs for tomographic, wide-field wavefront sensing, coupled with open-loop (OL) correction, make their calibration a challenge. The correction of a discrete number of specific directions in the field allows for streamlined application of a general class of spatio-angular algorithms, initially proposed in Whiteley et al. [J. Opt. Soc. Am. A 15, 2097 (1998)], which is compatible with partial on-line calibration. The recent Learn & Apply algorithm from Vidal et al. [J. Opt. Soc. Am. A 27, A253 (2010)] can then be reinterpreted in a broader framework of tomographic algorithms and is shown to be a special case that exploits the particulars of OL and aperture-plane phase conjugation. An extension to embed a temporal prediction step to tackle sky-coverage limitations is discussed. The trade-off between lengthening the camera integration period, therefore increasing system lag error, and the resulting improvement in SNR can be shifted to higher guide-star magnitudes by introducing temporal prediction. The derivation of the optimal predictor and a comparison to suboptimal autoregressive models is provided using temporal structure functions. It is shown using end-to-end simulations of Raven, the MOAO science, and technology demonstrator for the 8 m Subaru telescope that prediction allows by itself the use of 1-magnitude-fainter guide stars.

© 2013 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: July 31, 2013
Revised Manuscript: October 28, 2013
Manuscript Accepted: November 9, 2013
Published: December 11, 2013

Citation
C. Correia, K. Jackson, J.-P. Véran, D. Andersen, O. Lardière, and C. Bradley, "Static and predictive tomographic reconstruction for wide-field multi-object adaptive optics systems," J. Opt. Soc. Am. A 31, 101-113 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-1-101

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