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Proceedings Paper

PASS-2: quantitative photometric measurements of the polychromatic laser guide star
Author(s): Matthias Schoeck; Renaud Foy; Jean-Paul Pique; Patrick Chevrou; Nancy Ageorges; Alain Denis Petit; Veronique Bellanger; Hayden Fews; Francoise-Claude Foy; Claudia Karin Hoegemann; Markus Laubscher; Olivier Peillet; Patricia Segonds; Michel Tallon; Jean-Marc Weulersse
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Paper Abstract

We present results from measurements of the return flux from a polychromatic sodium laser guide star produced in Pierrelatte, France during the PASS-2 experiment. In the experiment, photometry of light at 330, 569, 589, and 589.6 nm emitted by mesospheric sodium under two-color laser excitation (569 and 589 nm) was performed. The variation of oscillator and laser configurations as well as simultaneous measurements of the atmospheric coherence length and the mesospheric sodium density permit a comparison of the results with atomic physics models. Using the results, we can determine the setup that produces the maximum return flux from the polychromatic laser guide star. The knowledge gained will be used to aid the ELP- OA project, which has as its goal the design, testing, and implementation of an adaptive optics system that uses a polychromatic laser guide star for wave front tilt measurements.

Paper Details

Date Published: 7 July 2000
PDF: 12 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390338
Show Author Affiliations
Matthias Schoeck, Ctr. de Recherche Astronomique de Lyon (United States)
Renaud Foy, Ctr. de Recherche Astronomique de Lyon (France)
Jean-Paul Pique, Univ. Joseph Fourier (France)
Patrick Chevrou, Commissariat a l'Energie Atomique (France)
Nancy Ageorges, National Univ. of Ireland/Galway (Chile)
Alain Denis Petit, Commissariat a l'Energie Atomique (France)
Veronique Bellanger, Commissariat a l'Energie Atomique (France)
Hayden Fews, National Univ. of Ireland/Galway (Ireland)
Francoise-Claude Foy, Ctr. de Recherche Astronomique de Lyon (France)
Claudia Karin Hoegemann, Ctr. de Recherche Astronomique de Lyon (Spain)
Markus Laubscher, Univ. Joseph Fourier (Switzerland)
Olivier Peillet, Commissariat a l'Energie Atomique (France)
Patricia Segonds, Univ. Joseph Fourier (France)
Michel Tallon, Ctr. de Recherche Astronomique de Lyon (France)
Jean-Marc Weulersse, Commissariat a l'Energie Atomique (France)

Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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