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Proceedings Paper

System overview of 30 W and 55 W sodium guide star laser systems
Author(s): Nicholas Sawruk; Ian Lee; Munib Jalali; Zachary Prezkuta; Ken Groff; Jared Roush; Nathan Rogers; Bruce Tiemann; Steve Hannon; Joe Alford; Céline d'Orgeville; Vincent Fesquet; Richard Oram; Sean M. Adkins; Kenny Grace
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Paper Abstract

We report on the successful delivery of a 30 W solid-state sodium Guide Star Laser System (GLS) to the W. M. Keck Observatory in 2009, and the demonstration of a 55 W GLS delivered to the Gemini South Observatory in 2010. This paper describes the GLS performance results of both the Keck I and Gemini South GLSs with an emphasis on the system design and delivered performance. The 589 nm output was generated via Sum Frequency Mixing (SFM) of 1064 nm and 1319 nm Nd:YAG lasers in a LBO (Lithium Triborate) nonlinear crystal. The Keck GLS underwent extensive testing and has demonstrated consistent performance with a CW mode-locked output of > 30 W and measured beam quality of M2 < 1.2 while locked to the sodium D2a transition. The Keck GLS was installed on the telescope in late 2009 and first light on the sky was achieved in early 2010. Factory testing of the Gemini South GLS shows a CW modelocked output of > 55 W and measured M2 ~1.2 while locked to the sodium D2a line center. The Gemini South GLS has produced a maximum power of 76 W at 589 nm with 85 W of 1319 nm and 110 W of 1064 nm as inputs to the SFM, representing a single-pass conversion efficiency of 39%.

Paper Details

Date Published: 28 July 2010
PDF: 8 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77361Y (28 July 2010); doi: 10.1117/12.858218
Show Author Affiliations
Nicholas Sawruk, Lockheed Martin Coherent Technologies (United States)
Ian Lee, Lockheed Martin Coherent Technologies (United States)
Munib Jalali, Lockheed Martin Coherent Technologies (United States)
Zachary Prezkuta, Lockheed Martin Coherent Technologies (United States)
Ken Groff, Lockheed Martin Coherent Technologies (United States)
Jared Roush, Lockheed Martin Coherent Technologies (United States)
Nathan Rogers, Lockheed Martin Coherent Technologies (United States)
Bruce Tiemann, Lockheed Martin Coherent Technologies (United States)
Steve Hannon, Lockheed Martin Coherent Technologies (United States)
Joe Alford, Lockheed Martin Coherent Technologies (United States)
Céline d'Orgeville, Gemini South Observatory (Chile)
Vincent Fesquet, Gemini South Observatory (Chile)
Richard Oram, Gemini North Observatory (United States)
Sean M. Adkins, W. M. Keck Observatory (United States)
Kenny Grace, W. M. Keck Observatory (United States)


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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