JATIS Letters

Daylight operation of a sodium laser guide star for adaptive optics wavefront sensing

[+] Author Affiliations
Michael Hart

University of Arizona, College of Optical Sciences, 1630 East University Boulevard, Tucson, Arizona 85721, United States

University of Hawai’i, Institute for Astronomy, 34 Ohia Ku Street, Pukalani, Hawaii 96768, United States

Stuart M. Jefferies

University of Hawai’i, Institute for Astronomy, 34 Ohia Ku Street, Pukalani, Hawaii 96768, United States

Georgia State University, Department of Physics and Astronomy, 25 Park Place, Atlanta, Georgia 30303, United States

Neil Murphy

Jet Propulsion Laboratory, Mail Stop 180 600, 4800 Oak Grove Drive, Pasadena, California 91109, United States

J. Astron. Telesc. Instrum. Syst. 2(4), 040501 (Oct 26, 2016). doi:10.1117/1.JATIS.2.4.040501
History: Received June 22, 2016; Accepted October 13, 2016
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Abstract.  We report contrast measurements of a sodium resonance guide star against the daylight sky when observed through a tuned magneto-optical filter (MOF). The guide star was created by projection of a laser beam at 589.16 nm into the mesospheric sodium layer and the observations were made with a collocated 1.5-m telescope. While MOFs are used with sodium light detecting and ranging systems during the day to improve the signal-to-noise ratio of the measurements, they have not so far been employed with laser guide stars to drive adaptive optics (AO) systems to correct atmospherically induced image blur. We interpret our results in terms of the performance of AO systems for astronomy, with particular emphasis on thermal infrared observations at the next generation of extremely large telescopes now being built.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Michael Hart ; Stuart M. Jefferies and Neil Murphy
"Daylight operation of a sodium laser guide star for adaptive optics wavefront sensing", J. Astron. Telesc. Instrum. Syst. 2(4), 040501 (Oct 26, 2016). ; http://dx.doi.org/10.1117/1.JATIS.2.4.040501


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