Image Improvement from a Sodium-Layer Laser Guide Star Adaptive Optics System

Max, C. E.; Olivier, Scot S.; Friedman, Herbert W.; An, Jong R.; Avicola, K.; Beeman, B. V.; Bissinger, H. D.; Brase, Jim; Erbert, G.; Gavel, Donald T.; Kanz, K.; Liu, Mengmeng; Macintosh, Bruce; Neeb, Kurt P.; Patience, Jennifer; Waltjen, Kenneth E.

doi:10.1126/science.277.5332.1649

Cited by 162 publications

(59 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A very positive positive, on the other hand, is the achievement of the diffraction limit to full width at half-maximum of images obtained with the Lick 120 inch telescope, using a sodium-laser "guide star" reported by Max et al (1997), who note that the suggestion can be traced back to Babcock (1953). And we are grateful to the authors for explaining what a Strehl ratio is, since we had forgotten an equal number of times to having been told.…”

Section: A-masingmentioning

confidence: 99%

Astrophysics in 1997

Trimble¹,

McFadden²

1998

PUBL ASTRON SOC PAC

View full text Add to dashboard Cite

ABSTRACT. Martian marvels, a gamma-ray burster with a redshift, Galileo converses with Ganymede, a record galactic redshift of 4.92, and much else. Fiscal 1997 was definitely an exciting year for astronomers. We have tried hard to hit all the obvious highlights, but also to report more gradual progress on traditional problems of understanding planets, stars, galaxies, and the universe. Though the year was saddened by the loss of many valued colleagues, we nevertheless indulge in occasional soupçons of frivolity.

show abstract

Section: A-masingmentioning

confidence: 99%

Astrophysics in 1997

Trimble¹,

McFadden²

1998

PUBL ASTRON SOC PAC

View full text Add to dashboard Cite

show abstract

“…It should be said that the laser requirement will vary widely depending on the intended specific use. For instance, the spectroscopic study of the hyperfine structure of sodium could be performed with a 589.5 nm, 10 nm-tuneable source producing < 100 mW of light, while use in astronomy as a laser guidestar requires powers in excess of 20 W [21,22].…”

Section: Applicationsmentioning

confidence: 99%

“…QWs and therefore include a high number (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) of QWs [87,88]. The addition of AlGaAs carrier-blocking layers to prevent long-range diffusion of carriers in the barriers is also deemed advantageous [87] (see Fig.…”

Section: Nm-940 Nm Sdlsmentioning

confidence: 99%

Semiconductor disk lasers for the generation of visible and ultraviolet radiation

Calvez¹,

Hastie

Guina

et al. 2009

Laser & Photonics Reviews

154

View full text Add to dashboard Cite

Recent developments in semiconductor disk lasers (SDLs) generating visible or ultraviolet light are reviewed. After an introduction on potential applications, we discuss how the combination of vertical-emitting semiconductor GaAs-based structures and intra-cavity nonlinear conversion techniques can be successfully exploited to uniquely meet demands for continuous-wave radiation in the visible and ultraviolet spectral range. To do so, an overview of the device operating principles and performance is presented highlighting the underlying material considerations, semiconductor structural designs, thermal management techniques and suitable cavity configurations. This summary is completed by a presentation of new developments in the field, with a particular focus on the trends towards miniaturization.Green-pumped direct-red-emitting Semiconductor Disk Laser.

show abstract

“…The most feasible of these approaches for very large telescopes is to use a sodium-wavelength laser to excite the sodium atoms in Earth's mesosphere (Foy & Labeyrie 1985;Thompson & Gardner 1987). Although experiments with various lasers have been performed at a number of observatories, only a few laser guide star (LGS) based science papers have been published (McCullough et al 1995;Hackenberg et al 2000;Perrin et al 2004), and until recently only the Lick 3 m telescope sodium LGS system has been performing LGS observations on a regular basis (Max et al 1997 systems have been in operation on the Keck II and Keck I Telescopes since 1999 (Wizinowich et al 2000a(Wizinowich et al , 2000b and 2000, respectively. The science instruments behind the AO system have included KCAM, a simple near-infrared imaging engineering camera; NIRSPEC, a near-infrared spectrograph (McLean et al 1998); NIRC2, a near-infrared camera designed explicitly for AO (K. Matthews et al 2006, in preparation); an interferometer that combines the light from both telescopes (Colavita et al 2004); and OSIRIS, an OH-suppression infrared integral field spectrograph (Larkin et al 2003).…”

Section: Introductionmentioning

confidence: 99%

The W. M. Keck Observatory Laser Guide Star Adaptive Optics System: Overview

Wizinowich

Mignant

Bouchez

et al. 2006

PUBL ASTRON SOC PAC

424

198

View full text Add to dashboard Cite

ABSTRACT. The Keck Observatory began science observations with a laser guide star adaptive optics system, the first such system on an 8-10 m class telescope, in late 2004. This new capability greatly extends the scientific potential of the Keck II Telescope, allowing near-diffraction-limited observations in the near-infrared using natural guide stars as faint as 19th magnitude. This paper describes the conceptual approach and technical implementation followed for this system, including lessons learned, and provides an overview of the early science capabilities.

show abstract

Image Improvement from a Sodium-Layer Laser Guide Star Adaptive Optics System

Cited by 162 publications

References 14 publications

Astrophysics in 1997

Astrophysics in 1997

Semiconductor disk lasers for the generation of visible and ultraviolet radiation

The W. M. Keck Observatory Laser Guide Star Adaptive Optics System: Overview

Contact Info

Product

Resources

About