Near Ground Measurements Of Beam Shaping And Anisotropic Turbulence Over Concrete Runway And Grass Range

Keywords

anisotropic turbulence; atmospheric turbulence; Gaussian beam; index gradient; scintillation index

Abstract

Researchers from the University of Central Florida recently carried out a series of measurements over a concrete runway and a grass range using a 632.8 nm Gaussian beam propagated for 100 or 125 m at a height of 2 m. Mean intensity and scintillation index contours varied significantly throughout these measurements in ways that corresponded to more than simple isotropy or anisotropy of optical turbulence. A simple theory is developed to show the effect of a nonlinear index of refraction gradient in addition to the possibility of anisotropic turbulence. Theoretical contours are compared to experimental results which seem to indicate the presence of a beam shaping phenomena near the ground in addition to anisotropy.

Publication Date

1-1-2018

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

10770

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2323317

Socpus ID

85058210877 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85058210877

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