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Proceedings Paper

The performance of the laser guide star system for the Subaru Telescope
Author(s): Yoshihiko Saito; Yutaka Hayano; Meguro Ito; Yosuke Minowa; Sebastian Egner; Shin Oya; Makoto Watanabe; Masayuki Hattori; Vincent Garrel; Kazuyuki Akagawa; Olivier Guyon; Stephen Colley; Taras Golota; Norihito Saito; Akira Takazawa; Mayumi Ito; Hideki Takami; Satoshi Wada; Masanori Iye
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Paper Abstract

We are developing a laser guide star (LGS) system for the 188-elements Adaptive Optics system (AO188) of the Subaru telescope. In this paper we describe the results of the performance tests of the LGS system. The beam that excites sodium atoms at 90 km altitude of the LGS is generated by the following sequence. The source of the beam is a quasi-CW mode locked sum-frequency generating 589 nm laser. This laser beam propagates through a diagnostics system for measuring the wavelength and the beam quality. Then it couples into a solidcore photonic crystal fiber cable for transmitting the beam to a telescope for launching the beam (LLT: Laser Launching Telescope). The output beam from this fiber cable is collimated by the optics mounted on the LLT. This collimated beam is expanded by the LLT and launched into the sky. We executed several engineering observations of the LGS system from 2009 for confirming the performance of all the components in this sequence. We also report the quality of the LGS.

Paper Details

Date Published: 28 July 2010
PDF: 8 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773653 (28 July 2010); doi: 10.1117/12.856484
Show Author Affiliations
Yoshihiko Saito, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Yutaka Hayano, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Meguro Ito, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Yosuke Minowa, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Sebastian Egner, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Shin Oya, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Makoto Watanabe, Hokkaido Univ. (Japan)
Masayuki Hattori, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Vincent Garrel, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Kazuyuki Akagawa, SINGLE-MODE Co., Ltd. (Japan)
Olivier Guyon, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Stephen Colley, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Taras Golota, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Norihito Saito, The Institute of Physical and Chemical-RIKEN (Japan)
Akira Takazawa, Megaopto Co., Ltd. (Japan)
Mayumi Ito, Megaopto Co., Ltd. (Japan)
Hideki Takami, National Astronomical Observatory of Japan/Subaru Telescope (United States)
Satoshi Wada, The Institute of Physical and Chemical-RIKEN (Japan)
Megaopto Co., Ltd. (Japan)
Masanori Iye, National Astronomical Observatory of Japan (Japan)
Graduate Univ. for Advanced Studies (Japan)


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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