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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 21 — Jul. 20, 1994
  • pp: 4880–4888

Remote sensing of atmospheric turbulence and transverse winds from wave-front slope measurements from crossed optical paths

Byron M. Welsh and Steven C. Koeffler  »View Author Affiliations


Applied Optics, Vol. 33, Issue 21, pp. 4880-4888 (1994)
http://dx.doi.org/10.1364/AO.33.004880


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Abstract

In the theory of atmospheric turbulence, the strength of the spatial variations of the index of refraction n is proportional to a parameter known as the atmospheric-structure constant. The atmospheric-structure constant is denoted C n 2 ( z ) and is a function of position along the optical path z. The characteristics of the temporal variations of the index of refraction are related to both C n 2 ( z ) and to the transverse wind velocity V(z). Current optical techniques for remotely sensing C n 2 ( z ) and V(z) rely primarily on the spatial or temporal cross-correlation properties of the intensity of the optical field. In the remote-sensing technique proposed here, we exploit the correlation properties of the wave-front slope measured from two point sources to obtain profiles of C n 2 ( z ) and V(z). The two sources are arranged to give crossed optical paths. The geometry of the crossed paths and the characteristics of the wave-front slope sensor determine the achievable resolution. The signal-to-noise ratio calculations indicate the need for multiple measurements to obtain useful estimates of the desired quantities.

© 1994 Optical Society of America

History
Original Manuscript: June 17, 1993
Revised Manuscript: October 20, 1993
Published: July 20, 1994

Citation
Byron M. Welsh and Steven C. Koeffler, "Remote sensing of atmospheric turbulence and transverse winds from wave-front slope measurements from crossed optical paths," Appl. Opt. 33, 4880-4888 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-21-4880

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