Keck I laser guide star adaptive optics system

Chin, Jason C. Y.; Wizinowich, Peter; Campbell, Randy; Chock, Liz; Cooper, Andrew; James, Ean; Lyke, Jim; Mastromarino, J.; Martin, Olivier; Medeiros, D.; Morrison, D.; Neyman, C.; Panteleev, Sergey; Stalcup, Thomas; Tucker, Pete; Wetherell, Ed; Dam, Marcos van

doi:10.1117/12.925807

Cited by 16 publications

(10 citation statements)

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“…Further discussion of the LGS AO system and the results of on sky testing may be found in the paper by Chin et al [5] at this conference. …”

Section: Keck I Laser Guide Star Adaptive Opticsmentioning

confidence: 99%

“…Shared risk science observing began in May 2012 [5] and full science observations are expected to begin in August 2012. Motivated by the scientific success of the Keck II LGS AO system which has been in full science operations since 2004, WMKO began the development of new 589 nm wavelength guide stars lasers in collaboration with the Gemini Observatory for the Keck I telescope and the Gemini South telescope.…”

Section: Keck I Laser Guide Star Adaptive Opticsmentioning

confidence: 99%

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Advances in instrumentation at the W. M. Keck Observatory

Adkins¹,

Armandroff²,

Johnson³

et al. 2012

SPIE Proceedings

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In this paper we describe both recently completed instrumentation projects and our current development efforts in terms of their role in the strategic plan, the key science areas they address, and their performance as measured or predicted. Projects reaching completion in 2012 include MOSFIRE, a near IR multi-object spectrograph, a laser guide star adaptive optics facility on the Keck I telescope, and an upgrade to the guide camera for the HIRES instrument on Keck I. Projects in development include a new seeing limited integral field spectrograph for the visible wavelength range called the Keck Cosmic Web Imager (KCWI), an upgrade to the telescope control systems on both Keck telescopes, a near-IR tip/tilt sensor for the Keck I adaptive optics system, and a new grating for the OSIRIS integral field spectrograph.

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“…Further discussion of the LGS AO system and the results of on sky testing may be found in the paper by Chin et al [5] at this conference. …”

Section: Keck I Laser Guide Star Adaptive Opticsmentioning

confidence: 99%

Section: Keck I Laser Guide Star Adaptive Opticsmentioning

confidence: 99%

Advances in instrumentation at the W. M. Keck Observatory

Adkins¹,

Armandroff²,

Johnson³

et al. 2012

SPIE Proceedings

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“…The first science operations with laser guide star (LGS) adaptive optics (AO) began in 2004 on the Keck II telescope [2] .Since that time LGS AO has been commissioned for science operations on the Keck I telescope [3] and LGS AO has grown to be a significant part of the WMKO community's requested observing time, accounting for over 140 nights of the nominal 700 nights per year available for observing on the two telescopes. Publications based on AO observations have grown in number as well, with a total of 515 refereed science papers published as of April 2014 using Keck AO observations, with 193 of these based on LGS AO observations.…”

Section: Adaptive Opticsmentioning

confidence: 99%

New developments in instrumentation at the W. M. Keck Observatory

et al. 2014

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The W. M. Keck Observatory continues to develop new capabilities in support of our science driven strategic plan which emphasizes leadership in key areas of observational astronomy. This leadership is a key component of the scientific productivity of our observing community and depends on our ability to develop new instrumentation, upgrades to existing instrumentation, and upgrades to supporting infrastructure at the observatory. In this paper we describe the as measured performance of projects completed in 2014 and the expected performance of projects currently in the development or construction phases. Projects reaching completion in 2014 include a near-IR tip/tilt sensor for the Keck I adaptive optics system, a new center launch system for the Keck II laser guide star facility, and NIRES, a near-IR Echelle spectrograph for the Keck II telescope. Projects in development include a new seeing limited integral field spectrograph for the visible wavelength range called the Keck Cosmic Web Imager, a deployable tertiary mirror for the Keck I telescope, upgrades to the spectrograph detector and the imager of the OSIRIS instrument, and an upgrade to the telescope control systems on both Keck telescopes.

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“…The Keck I laser also has a similar CLS type beam transport, although more challenging due to the fixed gravity orientation of the laser mounted on the Nasmyth platform. The Keck I LGSAO system was completed in 2012 (Chin et al [7]). The CLS reduces the spot elongation by projecting the laser beam from behind the telescope's secondary mirror.…”

Section: Ngl System Overviewmentioning

confidence: 99%

Keck II laser guide star AO system and performance with the TOPTICA/MPBC laser

et al. 2016

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The Keck II Laser Guide Star (LGS) Adaptive Optics (AO) System was upgraded from a dye laser to a TOPTICA/MPBC Raman-Fibre Amplification (RFA) laser in December 2015. The W. M. Keck Observatory (WMKO) has been operating its AO system with a LGS for science since 2004 using a first generation 15 W dye laser. Using the latest diode pump laser technology, Raman amplification, and a well-tuned second harmonic generator (SHG), this Next Generation Laser (NGL) is able to produce a highly stable 589 nm laser beam with the required power, wavelength and mode quality. The beam's linear polarization and continuous wave format along with optical back pumping are designed to improve the sodium atom coupling efficiency over previously operated sodium-wavelength lasers. The efficiency and operability of the new laser has also been improved by reducing its required input power and cooling, size, and the manpower to operate and maintain it.The new laser has been implemented on the telescope's elevation ring with its electronics installed on a new Nasmyth sub-platform, with the capacity to support up to three laser systems for future upgrades. The laser is projected from behind the telescope's secondary mirror using the recently implemented center launch system (CLS) to reduce LGS spot size. We will present the new laser system and its performance with respect to power, stability, wavelength, spot size, optical repumping, polarization, efficiency, and its return with respect to pointing alignment to the magnetic field. Preliminary LGSAO performance is presented with the system returning to science operations. We will also provide an update on current and future upgrades at the WMKO.

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Keck I laser guide star adaptive optics system

Cited by 16 publications

References 0 publications

Advances in instrumentation at the W. M. Keck Observatory

Advances in instrumentation at the W. M. Keck Observatory

New developments in instrumentation at the W. M. Keck Observatory

Keck II laser guide star AO system and performance with the TOPTICA/MPBC laser

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