Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Adaptive optics with four laser guide stars: correction of the cone effect in large telescopes

Not Accessible

Your library or personal account may give you access

Abstract

We study the performance of an adaptive optics (AO) system with four laser guide stars (LGSs) and a natural guide star (NGS). The residual cone effect with four LGSs is obtained by a numerical simulation. This method allows the adaptive optics system to be extended toward the visible part of the spectrum without tomographic reconstruction of three-dimensional atmospheric perturbations, resolving the cone effect in the visible. Diffraction-limited images are obtained with 17-arc ms precision in median atmospheric conditions at wavelengths longer than 600 nm. The gain achievable with such a system operated on an existing AO system is studied. For comparison, performance in terms of achievable Strehl ratio is also computed for a reasonable system composed of a 40 × 40 Shack–Hartmann wave-front sensor optimized for the I band. Typical errors of a NGS wave front are computed by use of analytical formulas. With the NGS errors and the cone effect, the Strehl ratio can reach 0.45 at 1.25 µm under good-seeing conditions with the Nasmyth Adaptive Optics System (NAOS; a 14 × 14 subpupil wave-front sensor) at the Very Large Telescope and 0.8 with a 40 × 40 Shack–Hartmann wave-front sensor.

© 2002 Optical Society of America

Full Article  |  PDF Article
More Like This
Methods for correcting tilt anisoplanatism in laser-guide-star-based multiconjugate adaptive optics

Brent L. Ellerbroek and François Rigaut
J. Opt. Soc. Am. A 18(10) 2539-2547 (2001)

Analysis of modes and behavior of a multiconjugate adaptive optics system

Miska Le Louarn and Michel Tallon
J. Opt. Soc. Am. A 19(5) 912-925 (2002)

Adaptive optics sky coverage modeling for extremely large telescopes

Richard M. Clare, Brent L. Ellerbroek, Glen Herriot, and Jean-Pierre Véran
Appl. Opt. 45(35) 8964-8978 (2006)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved