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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: Stephen A. Burns
  • Vol. 25, Iss. 8 — Aug. 1, 2008
  • pp: 2114–2121

Multiconjugate adaptive optics results from the laboratory for adaptive optics MCAO/MOAO testbed

Edward A. Laag, S. Mark Ammons, Donald T. Gavel, and Renate Kupke  »View Author Affiliations


JOSA A, Vol. 25, Issue 8, pp. 2114-2121 (2008)
http://dx.doi.org/10.1364/JOSAA.25.002114


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Abstract

We report on the development of wavefront reconstruction and control algorithms for multiconjugate adaptive optics (MCAO) and the results of testing them in the laboratory under conditions that simulate an 8 meter class telescope. The University of California Observatories (UCO) Lick Observatory Laboratory for Adaptive Optics multiconjugate testbed allows us to test wide-field-of-view adaptive optics systems as they might be instantiated in the near future on giant telescopes. In particular, we have been investigating the performance of MCAO using five laser beacons for wavefront sensing and a minimum-variance algorithm for control of two conjugate deformable mirrors. We have demonstrated improved Strehl ratio and enlarged field-of-view performance when compared to conventional AO techniques. We have demonstrated improved MCAO performance with the implementation of a routine that minimizes the generalized isoplanatism when turbulent layers do not correspond to deformable mirror conjugate altitudes. Finally, we have demonstrated suitability of the system for closed loop operation when configured to feed back conditional mean estimates of wavefront residuals rather than the directly measured residuals. This technique has recently been referred to as the “pseudo-open-loop” control law in the literature.

© 2008 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(170.6960) Medical optics and biotechnology : Tomography
(350.1260) Other areas of optics : Astronomical optics
(010.1285) Atmospheric and oceanic optics : Atmospheric correction

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: December 4, 2007
Revised Manuscript: April 10, 2008
Manuscript Accepted: June 5, 2008
Published: July 24, 2008

Citation
Edward A. Laag, S. Mark Ammons, Donald T. Gavel, and Renate Kupke, "Multiconjugate adaptive optics results from the laboratory for adaptive optics MCAO/MOAO testbed," J. Opt. Soc. Am. A 25, 2114-2121 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-8-2114


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