Compensation effectiveness analysis of low-order-correction adaptive optical system for non-Kolmogorov turbulence

Changhui Rao; Wenhan Jiang; Ning Ling

doi:10.1117/12.363586

27 September 1999 Compensation effectiveness analysis of low-order-correction adaptive optical system for non-Kolmogorov turbulence

Changhui Rao, Wenhan Jiang, Ning Ling

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Proceedings Volume 3762, Adaptive Optics Systems and Technology; (1999) https://doi.org/10.1117/12.363586
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

For non-Kolmogorov turbulence, phase structure function, residual phase structure function and long-exposure modulation transfer function (MTF) of low-order correction adaptive optical system are deduced by introducing generalized phase spatial spectrum. The analysis shows long- exposure MTF is as functions of (Beta) , which is the power- law exponent of phase power spectrum, and (rho) ₀, which indicates the strength of atmospheric turbulence. Numerical results of long-exposure MTF, Strehl ratio and FWHM for different (Beta) and (rho) ₀ are presented under the following conditions respectively: (1) the wavefront disturbance is not correcte,d namely open-loop; (2) the wavefront tilts are corrected; (3) one order and two order modes are corrected.

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Changhui Rao, Wenhan Jiang, and Ning Ling "Compensation effectiveness analysis of low-order-correction adaptive optical system for non-Kolmogorov turbulence", Proc. SPIE 3762, Adaptive Optics Systems and Technology, (27 September 1999); https://doi.org/10.1117/12.363586

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KEYWORDS

Modulation transfer functions

Turbulence

Adaptive optics

Wavefronts

Optical calibration

Atmospheric turbulence

Phase shift keying

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