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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 18 — Jun. 20, 2000
  • pp: 3023–3031

Numerical simulation of an adaptive optics system with laser propagation in the atmosphere

Hai-Xing Yan, Shu-Shan Li, De-Liang Zhang, and She Chen  »View Author Affiliations


Applied Optics, Vol. 39, Issue 18, pp. 3023-3031 (2000)
http://dx.doi.org/10.1364/AO.39.003023


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Abstract

A comprehensive model of laser propagation in the atmosphere with a complete adaptive optics (AO) system for phase compensation is presented, and a corresponding computer program is compiled. A direct wave-front gradient control method is used to reconstruct the wave-front phase. With the long-exposure Strehl ratio as the evaluation parameter, a numerical simulation of an AO system in a stationary state with the atmospheric propagation of a laser beam was conducted. It was found that for certain conditions the phase screen that describes turbulence in the atmosphere might not be isotropic. Numerical experiments show that the computational results in imaging of lenses by means of the fast Fourier transform (FFT) method agree well with those computed by means of an integration method. However, the computer time required for the FFT method is 1 order of magnitude less than that of the integration method. Phase tailoring of the calculated phase is presented as a means to solve the problem that variance of the calculated residual phase does not correspond to the correction effectiveness of an AO system. It is found for the first time to our knowledge that for a constant delay time of an AO system, when the lateral wind speed exceeds a threshold, the compensation effectiveness of an AO system is better than that of complete phase conjugation. This finding indicates that the better compensation capability of an AO system does not mean better correction effectiveness.

© 2000 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(350.1260) Other areas of optics : Astronomical optics
(350.4600) Other areas of optics : Optical engineering

History
Original Manuscript: July 23, 1999
Revised Manuscript: December 6, 1999
Published: June 20, 2000

Citation
Hai-Xing Yan, Shu-Shan Li, De-Liang Zhang, and She Chen, "Numerical simulation of an adaptive optics system with laser propagation in the atmosphere," Appl. Opt. 39, 3023-3031 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-18-3023

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