Title

Deep Turbulence Propagation Of A Gaussian-Beam Wave In Anisotropic Non-Kolmogorov Turbulence

Keywords

Anisotropic turbulence; Gaussian-beam wave; Non-Kolmogorov; Scintillation index

Abstract

In the conventional Kolmogorov model of turbulence the turbulent fluctuations of the index of refraction are assumed to be statistically homogeneous and isotropic, and there is a specific mathematical form for the power spectral density of the index of refraction fluctuations. Development of the turbulent theory of passive scalar transfer has shown that although the conventional Kolmogorov spectrum model with a 11/3 power-law index is generally correct near the ground (within the inertial subrange), it constitutes only one part of the more general behavior of passive scalar transfer in a turbulent flow Hence, deviations from the conventional Kolmogorov model are possible In this study we develop theoretical models for beam spot size, spatial coherence, and scintillation index that are valid in weak irradiance fluctuation regimes as well as in deep turbulence, or strong irradiance fluctuation regimes These theoretical models are based on power-law index variations 3 <α < 4 in the spatial power spectrum model of atmospheric turbulence in addition to anisotropic conditions. © 2013 SPIE.

Publication Date

11-28-2013

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8874

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2026405

Socpus ID

84888178404 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84888178404

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