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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 1 — Jan. 1, 2009
  • pp: A47–A57

Deep turbulence effects compensation experiments with a cascaded adaptive optics system using a 3.63 m telescope

Mikhail Vorontsov, Jim Riker, Gary Carhart, V. S. Rao Gudimetla, Leonid Beresnev, Thomas Weyrauch, and Lewis C. Roberts, Jr.  »View Author Affiliations


Applied Optics, Vol. 48, Issue 1, pp. A47-A57 (2009)
http://dx.doi.org/10.1364/AO.48.000A47


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Abstract

Compensation of extended (deep) turbulence effects is one of the most challenging problems in adaptive optics (AO). In the AO approach described, the deep turbulence wave propagation regime was achieved by imaging stars at low elevation angles when image quality improvement with conventional AO was poor. These experiments were conducted at the U.S. Air Force Maui Optical and Supercomputing Site (AMOS) by using the 3.63 m telescope located on Haleakala, Maui. To enhance compensation performance we used a cascaded AO system composed of a conventional AO system based on a Shack–Hartmann wavefront sensor and a deformable mirror with 941 actuators, and an AO system based on stochastic parallel gradient descent optimization with four deformable mirrors (75 control channels). This first-time field demonstration of a cascaded AO system achieved considerably improved performance of wavefront phase aberration compensation. Image quality was improved in a repeatable way in the presence of stressing atmospheric conditions obtained by using stars at elevation angles as low as 15 ° .

© 2008 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(140.3290) Lasers and laser optics : Laser arrays
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3298) Lasers and laser optics : Laser beam combining

History
Original Manuscript: June 17, 2008
Revised Manuscript: September 30, 2008
Manuscript Accepted: October 1, 2008
Published: November 7, 2008

Citation
Mikhail Vorontsov, Jim Riker, Gary Carhart, V. S. Rao Gudimetla, Leonid Beresnev, Thomas Weyrauch, and Lewis C. Roberts, Jr., "Deep turbulence effects compensation experiments with a cascaded adaptive optics system using a 3.63 m telescope," Appl. Opt. 48, A47-A57 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-1-A47


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