Keck I laser guide star AO system integration

Chin, Jason C. Y.; Stalcup, Thomas; Wizinowich, Peter; Panteleev, Sergey; Neyman, C.; Tsubota, K.; Summers, Douglas M.; Stomski, Paul J.; Medeiros, D.; Nance, Craig E.; Grace, Kenny; Cooper, Andrew; Wetherell, Ed; Doyle, Steve

doi:10.1117/12.857598

Cited by 7 publications

(5 citation statements)

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“…In the case of the Keck I laser SBS was not an issue because it was not stimulated by the short pulses of the LMCT mode-locked CW laser. The generation of red photons via SRS was observed above approximately 6 W of input power and the generation of additional frequencies via SPM was observed at power input levels starting below 1 W [34]. In the Keck I case this resulted in a complete redesign to a free space beam transport system and a significant schedule and budget increase.…”

Section: Laser Facilitiesmentioning

confidence: 95%

Progress in laser guide star adaptive optics and lessons learned

Wizinowich

2012

SPIE Proceedings

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Laser Guide Star (LGS) Adaptive Optics (AO) on large telescopes has recently become a very productive science tool for the astronomical community. Astronomical objects can now be observed at an unprecedented resolution over much of the sky. The science enabled by LGS AO and the capabilities and limitations of these systems will be discussed, along with the lessons learned that can be applied to LGS AO systems on existing and planned telescopes.

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Section: Laser Facilitiesmentioning

confidence: 95%

Progress in laser guide star adaptive optics and lessons learned

Wizinowich

2012

SPIE Proceedings

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“…First Sodium LGS AO were installed on Keck telescope and won several scientific research achievements. The first generation sodium LGS AO system of the twin telescopes of Keck I and Keck II began to run at 2012 and 2004 respectively [39][40][41][42][43][44]. The Sodium LGS was created by 6 dye laser fabricated by Lawrence Livermore National Laboratory with a power of 12W ∼14W, the return signal of the single LGS was comparable with a natural star of a magnitude of 9.5∼10.5 at V band (140∼ 55 photons/s/cm 2 ) .…”

Section: Lgs Aomentioning

confidence: 99%

Astronomical adaptive optics: a review

Rao,

Zhong,

Guo

et al. 2024

PhotoniX

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Since the concept of adaptive optics(AO) was proposed in 1953, AO has become an indispensable technology for large aperture ground-based optical telescopes aimed at high resolution observations. This paper provides a comprehensive review of AO progress for large aperture astronomical optical telescopes including both night-time and day-time solar optical telescopes. The recent AO technological advances, such as Laser Guide Star, Deformable Secondary Mirror, Extreme AO, and Multi-Conjugate AO are focused.

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“…With a Laser Guide Star being commissioned on the Keck I telescope [8] , the Keck Interferometer should benefit from a muchimproved sensitivity on very red objects. This was identified by the ASTRA project as a key instrumental development benefiting its Active Galactic Nuclei and Galactic Center programs.…”

Section: Adaptive Optics Laser Guide Starmentioning

confidence: 99%

First faint dual-field phase-referenced observations on the Keck interferometer

Woillez

Wizinowich

Akeson

et al. 2012

Optical and Infrared Interferometry III

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Ground-based long baseline interferometers have long been limited in sensitivity by the short integration periods imposed by atmospheric turbulence. The first observation fainter than this limit was performed on January 22, 2011 when the Keck Interferometer observed a K=11.5 target, about one magnitude fainter than its K=10.3 limit. This observation was made possible by the Dual Field Phase Referencing instrument of the ASTRA project: simultaneously measuring the real-time effects of the atmosphere on a nearby bright guide star, and correcting for it on the faint target, integration time longer than the turbulence time scale are made possible. As a prelude to this demonstration, we first present the implementation of Dual Field Phase Referencing on the interferometer. We then detail its on-sky performance focusing on the accuracy of the turbulence correction, and on the resulting fringe contrast stability. We conclude with a presentation of early results obtained with Laser Guide Star AO and the interferometer.

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Keck I laser guide star AO system integration

Cited by 7 publications

References 0 publications

Progress in laser guide star adaptive optics and lessons learned

Progress in laser guide star adaptive optics and lessons learned

Astronomical adaptive optics: a review

First faint dual-field phase-referenced observations on the Keck interferometer

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