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Optics Letters

Optics Letters

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  • Vol. 24, Iss. 15 — Aug. 1, 1999
  • pp: 1008–1010

Measuring the power-law exponent of an atmospheric turbulence phase power spectrum with a Shack Hartmann wave-front sensor

Changhui Rao, Wenhan Jiang, and Ning Ling  »View Author Affiliations


Optics Letters, Vol. 24, Issue 15, pp. 1008-1010 (1999)
http://dx.doi.org/10.1364/OL.24.001008


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Abstract

For non-Kolmogorov turbulence we develop a differential angle-of-arrival fluctuation coefficient, which is the ratio between the transverse and longitudinal differential angle-of-arrival variances, and a slope structure-correlation coefficient, which is the ratio between the transverse and longitudinal differences of the slope correlation function and the slope structure function, to measure the power-law exponent of a phase power spectrum with a Shack–Hartmann wave-front sensor: The differential arrival-of-angle fluctuation coefficient and the slope structure-correlation coefficient are both related to power-law exponent <i>β</i> and are independent of strength parameter <i>ρ</i><sub>0</sub> of the turbulence. We compare the methods developed and use them to evaluate <i>β</i> in recently completed horizontal atmospheric experiments for 1000-m laser beam propagation.

© 1999 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.7060) Atmospheric and oceanic optics : Turbulence
(010.7350) Atmospheric and oceanic optics : Wave-front sensing

Citation
Changhui Rao, Wenhan Jiang, and Ning Ling, "Measuring the power-law exponent of an atmospheric turbulence phase power spectrum with a Shack Hartmann wave-front sensor," Opt. Lett. 24, 1008-1010 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-15-1008

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