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Proceedings Paper

ARGOS: a laser star constellation for the LBT
Author(s): Shrikrishna Kanneganti; Sebastian Rabien; Matthias Deysenroth; Julian Ziegleder; Hans Gemperlein; Marcus Haug
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Paper Abstract

ARGOS is an innovative multi-star adaptive optics system being built for use with LUCIFER on the Large Binocular Telescope (LBT). LUCIFER is a wide field imager and multi-object spectrograph. Using a constellation of laser guide stars permits PSF correction over a wide field in exchange for a relatively small sacrifice in achievable correction. The laser constellation consists of three stars per each of the two eyes of the LBT. The stars are nominally positioned on a circle 2' in radius, but each star can be moved by upto 0.5' in any direction. Nd:YAG (SHG) lasers from InnoLas Laser GmbH are used to create the green (532nm) laser stars, and have an output above 18 W each at the planned pulsing frequency of 10kHz. The lasers are launched using a 40cm telescope and focused at a height of 12 km. The laser system is designed to be optically simple yet configurable. It also provisions for a central sodium laser to be installed later. We detail the characteristics of the laser system and the current state of its development.

Paper Details

Date Published: 22 July 2010
PDF: 9 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77364D (22 July 2010); doi: 10.1117/12.862448
Show Author Affiliations
Shrikrishna Kanneganti, Max-Planck-Institut für extraterrestrische Physik (Germany)
Sebastian Rabien, Max-Planck-Institut für extraterrestrische Physik (Germany)
Matthias Deysenroth, Max-Planck-Institut für extraterrestrische Physik (Germany)
Julian Ziegleder, Max-Planck-Institut für extraterrestrische Physik (Germany)
Hans Gemperlein, Max-Planck-Institut für extraterrestrische Physik (Germany)
Marcus Haug, Max-Planck-Institut für extraterrestrische Physik (Germany)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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