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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 25 — Sep. 1, 2006
  • pp: 6568–6576

Shack–Hartmann wavefront sensing with elongated sodium laser beacons: centroiding versus matched filtering

Luc Gilles and Brent Ellerbroek  »View Author Affiliations


Applied Optics, Vol. 45, Issue 25, pp. 6568-6576 (2006)
http://dx.doi.org/10.1364/AO.45.006568


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Abstract

We describe modeling and simulation results for the Thirty Meter Telescope on the degradation of sodium laser guide star Shack–Hartmann wavefront sensor measurement accuracy that will occur due to the spatial structure and temporal variations of the mesospheric sodium layer. By using a contiguous set of lidar measurements of the sodium profile, the performance of a standard centroid and of a more refined noise-optimal matched filter spot position estimation algorithm is analyzed and compared for a nominal mean signal level equal to 1000 photodetected electrons per subaperture per integration time, as a function of subaperture to laser launch telescope distance and CCD pixel readout noise. Both algorithms are compared in terms of their rms spot position estimation error due to noise, their associated wavefront error when implemented on the Thirty Meter Telescope facility adaptive optics system, their linear dynamic range, and their bias when detuned from the current sodium profile.

© 2006 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

History
Original Manuscript: November 21, 2005
Manuscript Accepted: April 10, 2006

Citation
Luc Gilles and Brent Ellerbroek, "Shack-Hartmann wavefront sensing with elongated sodium laser beacons: centroiding versus matched filtering," Appl. Opt. 45, 6568-6576 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-25-6568


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References

  1. B. L. Ellerbroek, M. Britton, R. Dekany, D. Gavel, G. Herriot, B. Macintosh, and J. Stoesz, "Adaptive Optics for the Thirty Meter Telescope," in Astronomical Adaptive Optics Systems and Applications II, R. K. Tyson and M. Lloyd-Hart, eds., Proc. SPIE 5903, 20-31 (2005).
  2. P. S. Argall, R. J. Sica, O. Vassiliev, and M. M. Mwangi, "Lidar measurements taken with a large-aperture liquid mirror: sodium resonance-fluorescence system," Appl. Opt. 39, 2393-2399 (2000). [CrossRef]
  3. C. d'Orgeville, F. Rigaut, and B. L. Ellerbroek, "LGS AO photon return simulations and laser requirements for the Gemini LGS AO program," Gemini Observatory preprint #55, available online at www.gemini.edu/documentation/webdocs/preprints/gpre55.pdf.
  4. B. L. Ellerbroek and G. M. Cochran, "Wave optics propagation code for multiconjugate adaptive optics," in Adaptive Optics Systems and Technology II, R. K. Tyson, D. Donaccini, and M. C. Roggemann, eds., Proc. SPIE 4494, 104-120 (2002). [CrossRef]
  5. B. L. Ellerbroek, "Wavefront reconstruction algorithms and simulation results for multiconjugate adaptive optics on giant telescopes," in Second Backaskog Workshop on Extremely Large Telescopes, A. L. Ardeberg and T. Andersen, eds., Proc. SPIE 5382, 478-489 (2004). [CrossRef]
  6. G. A. Tyler and D. L. Fried, "Image-position error associated with a quadrant detector," J. Opt. Soc. Am. 72, 804-808 (1982). [CrossRef]
  7. L. Gilles, "Closed-loop stability and performance analysis of least-squares and minimum-variance control algorithms for multiconjugate adaptive optics," Appl. Opt. 44, 993-1002 (2005). [CrossRef] [PubMed]
  8. J. W. Beletic, "Follow the yellow-orange rabbit: a CCD optimized for wavefront sensing a pulsed sodium laser guide star," in Optical and Infrared Detectors for Astronomy, J. D. Garnett and J. W. Beletic, eds., Proc. SPIE 5499, 302-309 (2004). [CrossRef]

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