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Comparison of multiconjugate adaptive optics configurations and control algorithms for the Gemini South 8-m telescope

Flicker, Ralf and Rigaut, François and Ellerbroek, Brent (2000) Comparison of multiconjugate adaptive optics configurations and control algorithms for the Gemini South 8-m telescope. In: Adaptive Optical Systems Technology. Proceedings of SPIE. No.4007. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 442-453. ISBN 9780819436320. https://resolver.caltech.edu/CaltechAUTHORS:20190118-124024105

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Abstract

This paper focuses on two main categories of the multiconjugate adaptive optics (MCAO) parameter space for performance optimization: the geometrical configuration of guide stars and deformable mirrors (DMs), and the wavefront reconstructors. From the first category it is shown how, for a fixed reconstructor and imaging wavelength, the performance metrics with a few important exceptions improve with an increasing number of (1) DMs, (2) actuators per DM and (3) guide stars. The metrics are seen to degrade with (1) an increasing field of compensation and (2) DM conjugation altitude mismatch with the significant turbulent atmospheric layers. In the second category, this study also compares the performance with a fixed MCAO configuration using the least- square estimator (LSE) and the maximum a posteriori estimator (MAP) for wavefront reconstruction. The MAP is shown to perform significantly better than the LSE at low or intermediate signal-to-noise ratios (SNRs), and somewhat better even in the absence of noise due to its a priori knowledge of the phase statistics.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.390347DOIArticle
Additional Information:© 2000 Society of Photo-optical Instrumentation Engineers (SPIE). The Gemini 8-m Telescopes Project and Observatory is managed by the Association of Universities for Research in Astronomy, for the National Science Foundation and the Gemini Board, under an international partnership agreement. The authors wish to thank Mark Chun for producing the layered turbulence profile used in the simulations, and Alexander Gontcharov for helpful comments and fruitful discussions.
Funders:
Funding AgencyGrant Number
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
Gemini PartnershipUNSPECIFIED
Subject Keywords:Multiconjugate adaptive optics, control algorithms , wavefront reconstruction
Series Name:Proceedings of SPIE
Issue or Number:4007
Record Number:CaltechAUTHORS:20190118-124024105
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190118-124024105
Official Citation:Ralf Flicker, Francois J. Rigaut, Brent L. Ellerbroek, "Comparison of multiconjugate adaptive optics configurations and control algorithms for the Gemini South 8-m telescope," Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390347
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92373
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Jan 2019 23:25
Last Modified:03 Oct 2019 20:43

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