Influence of the source spectrum on the accuracy of optical measurements of turbulence

V. P. Lukin

doi:10.1117/12.800584

9 October 2008 Influence of the source spectrum on the accuracy of optical measurements of turbulence

V. P. Lukin

Proceedings Volume 7108, Optics in Atmospheric Propagation and Adaptive Systems XI; 710808 (2008) https://doi.org/10.1117/12.800584
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

It is considered how the source spectrum influences the measurement accuracy of optical wave arrival angles, as well as the estimation accuracy of the path-averaged structure parameter of the refractive index fluctuations. Two reasons, which can cause the wavelength dependence of the variance of fluctuations of wave arrival angles, are analyzed. The first one is connected with the fact that phases depend on a wavelength in the approximation of smooth perturbations. The second reason is associated with the wavelength dependence of the refractive index and, consequently, its fluctuations. Strict equations are obtained to take into account the influence of the source spectrum on the measurement accuracy of the variance of arrival angle fluctuations and, indirectly, on the estimation accuracy of the path-averaged refractive index structure parameter. It can be stated that for most radiation sources (even nonmonochromatic) the influence of the source spectral composition can be neglected.

Citation Download Citation

V. P. Lukin "Influence of the source spectrum on the accuracy of optical measurements of turbulence", Proc. SPIE 7108, Optics in Atmospheric Propagation and Adaptive Systems XI, 710808 (9 October 2008); https://doi.org/10.1117/12.800584

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