Abstract

Formulations of the bichromatic correlation of scintillating irradiance are corrected by introducing the cospectrum of the two different refractive indices in place of the refractive index power spectrum. Receiver aperture averaging is included in the formulation. The effect of dispersion on the bichromatic correlation coefficient is studied and quantified for four specific experimental cases. Dispersion of the water vapor refractive index between wavelengths in the visible and 10 μm window is of particular significance in this study. In most cases, the effect of dispersion on the bichromatic correlation coefficient is much less than on the ratio of monochromatic irradiance correlations, and is negligible for practical considerations. The exception is the case of such strong humidity fluctuations that they (as opposed to temperature fluctuations) cause most of the scintillation of the midinfrared radiation.

© 1989 Optical Society of America

Comparison of scintillation methods for measuring the inner scale of turbulence

Reginald J. Hill
Appl. Opt. 27(11) 2187-2193 (1988)

Effects of temperature and humidity fluctuations on the optical refractive index in the marine boundary layer

Carl A. Friehe, J. C. La Rue, F. H. Champagne, C. H. Gibson, and G. F. Dreyer
J. Opt. Soc. Am. 65(12) 1502-1511 (1975)

Inner-scale effect on irradiance variance measured for weak-to-strong atmospheric scintillation

Anna Consortini, F. Cochetti, James H. Churnside, and Reginald J. Hill
J. Opt. Soc. Am. A 10(11) 2354-2362 (1993)

Temporal power spectra of irradiance scintillation for infrared optical waves’ propagation through marine atmospheric turbulence

Linyan Cui
J. Opt. Soc. Am. A 31(9) 2030-2037 (2014)

Two-color correlation of atmospheric scintillation

James H. Churnside, Richard J. Lataitis, and James J. Wilson
Appl. Opt. 31(21) 4285-4290 (1992)