Calar Alto ALFA and the sodium laser guide star in astronomy

1999 ◽  
Author(s):  
David J. Butler ◽  
Richard I. Davies ◽  
Hayden Fews ◽  
Wolfgang K. P. Hackenberg ◽  
Sebastian Rabien ◽  
...  
Keyword(s):  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Calar Alto

scholarly journals Adaptive Optics with a Laser Guide Star - The ALFA system

2001 ◽  
Vol 205 ◽  
pp. 453-454
Author(s):  
T. Ott ◽  
R. Davies ◽  
S. Rabien
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Trade Off ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Mandatory Use ◽  
Adaptive Optics System ◽  
Calar Alto ◽  
Better Than

All 8-metre class telescopes will be equipped with adaptive optics systems in order to reach their highest angular resolutions. With the additional requirement for maximal sky coverage comes the mandatory use of a laser guide star. ALFA is an adaptive optics system using a sodium laser guide star, which is installed on the 3.5-m telescope at Calar Alto observatory. It has shown that it is possible to reach Strehl ratios better than 20% in the K-band. In this contribution we describe the design of the system, the observational trade-off necessary to use a laser guide star, and the performance that might be expected.

scholarly journals Efficient modeless laser for a mesospheric sodium laser guide star

2003 ◽  
Vol 20 (10) ◽  
pp. 2093 ◽  
Author(s):  
Jean-Paul Pique ◽  
Sébastien Farinotti
Keyword(s):  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

scholarly journals Statistics of the sodium layer parameters at low geographic latitude and its impact on adaptive-optics sodium laser guide star characteristics

2010 ◽  
Vol 511 ◽  
pp. A31 ◽  
Author(s):  
N. Moussaoui ◽  
B. R. Clemesha ◽  
R. Holzlöhner ◽  
D. M. Simonich ◽  
D. Bonaccini Calia ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Geographic Latitude ◽  
Sodium Layer ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

Sodium Laser Guide Star Technique For Adaptive Imaging In Astronomy

1989 ◽  
Author(s):  
Chester S. Gardner ◽  
Byron M. Welsh ◽  
Laird A. Thompson
Keyword(s):  
Laser Guide Star ◽  
Adaptive Imaging ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

Analysis of perspective elongation for sodium laser guide star

2015 ◽  
Author(s):  
Feng Wang ◽  
Wei Zhang ◽  
Tianjiang Chen ◽  
Wenchao Zhou ◽  
Hong Yan
Keyword(s):  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

The Four-Laser Guide Star Facility: Design considerations and system implementation

2014 ◽  
Vol 3 (3) ◽  
Author(s):  
Domenico Bonaccini Calia ◽  
Wolfgang Hackenberg ◽  
Ronald Holzlöhner ◽  
Steffan Lewis ◽  
Thomas Pfrommer
Keyword(s):  
Adaptive Optics ◽  
Technical Solution ◽  
Laser Guide Star ◽  
Laser Guide Stars ◽  
Very Large Telescope ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Optical Telescopes ◽  
Atmospheric Seeing

AbstractGround-based optical telescopes, in particular large ones, require adaptive optics to overcome the atmospheric seeing limit due to turbulence. Correcting the distorted wavefront necessitates bright stars in the field of view. The sky coverage can be greatly increased by using artificial sodium laser guide stars in addition to natural guide stars. We describe the underlying physics and technical considerations relevant to such systems before discussing the design of the four-laser guide star facility (4LGSF) which is currently under development for the ESO Very Large Telescope (VLT) on Cerro Paranal, Chile. The focus is upon the justification of the requirements and their technical solution.

scholarly journals Sodium laser guide star system of ALFA

1997 ◽  
Author(s):  
Andreas Quirrenbach ◽  
Wolfgang K. P. Hackenberg ◽  
Hans-Christoph Holstenberg ◽  
Norbert Wilnhammer
Keyword(s):  
Star System ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

A Monte Carlo simulation for predicting photon return from sodium laser guide star

2015 ◽  
Author(s):  
Lu Feng ◽  
Edward Kibblewhite ◽  
Kai Jin ◽  
Suijian Xue ◽  
Zhixia Shen ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser
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