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Proceedings Paper

Correlation between intensity fluctuations in the mid- and long-IR bands for near sea transmission paths
Author(s): Charles S. Bendall; T. Bull; D. D. Wallin; J. T. Caulfield
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Paper Abstract

This paper describes the results of an experiment to measure the correlation between the atmospheric turbulence induced intensity fluctuations in the mid and long IR bands for transmission paths appropriate to the IRS&T. A DF laser operating at 3.8 microns and a carbon-dioxide laser operating at 9.24 microns served as the mid and long IR sources. The experiments were conducted on a 16 km transmission path over the Chesapeake Bay. Data was obtained under a variety of turbulence strengths including the transition between weak and strong turbulence. The experimental correlations values were compared to the predictions of a weak turbulence model. Dispersion between the indices of refraction at 3.8 microns and 9.24 microns appears to be responsible for significant disagreement between the measured and predicted results. Possible applications of the correlation for the IRS&T are briefly discussed.

Paper Details

Date Published: 13 August 1997
PDF: 12 pages
Proc. SPIE 3061, Infrared Technology and Applications XXIII, (13 August 1997); doi: 10.1117/12.280364
Show Author Affiliations
Charles S. Bendall, Naval Command, Control and Ocean Surveillance Ctr. (United States)
T. Bull, California State Univ./Long Beach (United States)
D. D. Wallin, California State Univ./Long Beach (United States)
J. T. Caulfield, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 3061:
Infrared Technology and Applications XXIII
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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