Abstract

One limitation to using laser beacons to measure tilt is focus anisoplanatism. By use of a spectral representation for the atmospheric turbulence, the wave-front error is expressible as an integral over the distribution of turbulence with height. Results are calculated for turbulence profiles typical of astronomical sites. The decrease in Strehl ratio when a single laser guide star is used to measure tip-tilt is shown to be especially significant at visible wavelengths, precisely where tip-tilt is most difficult to obtain from natural stars.

© 1996 Optical Society of America

Focus anisoplanatism effects on tip–tilt compensation for adaptive optics with use of a sodium laser beacon as a tracking reference

S. Esposito, A. Riccardi, and R. Ragazzoni
J. Opt. Soc. Am. A 13(9) 1916-1923 (1996)

Tilt angular anisoplanatism and a full-aperture tilt-measurement technique with a laser guide star

Mikhail S. Belen’kii
Appl. Opt. 39(33) 6097-6108 (2000)

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)

Experimental validation of a technique to measure tilt from a laser guide star

Mikhail S. Belen’kii, Stephen J. Karis, James M. Brown, and Robert Q. Fugate
Opt. Lett. 24(10) 637-639 (1999)

Tip–tilt reconstruction with a single dim natural guide star in multiconjugate adaptive optics with laser guide stars

Bruno Femenía
J. Opt. Soc. Am. A 22(12) 2719-2729 (2005)