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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. 22, Iss. 12 — Dec. 1, 2005
  • pp: 2719–2729

Tip-tilt reconstruction with a single dim natural guide star in multiconjugate adaptive optics with laser guide stars

Bruno Femenía  »View Author Affiliations


JOSA A, Vol. 22, Issue 12, pp. 2719-2729 (2005)
http://dx.doi.org/10.1364/JOSAA.22.002719


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Abstract

A solution to the problem of detecting the tip-tilt modes in multiconjugate adaptive optics (MCAO) with laser guide stars (LGS) is presented. This solution requires the presence of only a single relatively dim natural guide star (NGS) within the reconstructed field of view (FoV). The dim NGS is used for the reconstruction of the tip-tilt modes on the entire FoV, while the tomographic reconstruction of second-order and higher-order modes is made possible by having an LGS constellation with LGSs at different heights. Due to the relatively low brightness required for the tip-tilt NGS and the large corrected FoV (as compared with the case of conventional adaptive optics) the presented solution provides a means to achieve near-diffraction-limited performance of a 10-m-class telescope in the near infrared over a large portion of the sky. Sky coverage calculations assuming median seeing conditions indicate that this technique could be applied to 75% (95%) of the sky, achieving corrections with an average Strehl ratio ∼0.42(∼0.33) in the 2.2 µm K band across the 1.5′ reconstructed FoV.

© 2005 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7060) Atmospheric and oceanic optics : Turbulence
(010.7350) Atmospheric and oceanic optics : Wave-front sensing

ToC Category:
Atmospheric Optics

Citation
Bruno Femenía, "Tip-tilt reconstruction with a single dim natural guide star in multiconjugate adaptive optics with laser guide stars," J. Opt. Soc. Am. A 22, 2719-2729 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-12-2719

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