Reduction of laser intensity scintillations in turbulent atmospheres using time averaging of a partially coherent beam

We demonstrate experimentally and numerically that the application of a partially coherent beam (PCB) in combination with time averaging leads to a significant reduction in the scintillation index. We use a simplified experimental approach in which the atmospheric turbulence is simulated by a phase...

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Bibliographic Details
Published inarXiv.org
Main Authors Berman, G P, Bishop, A R, Chernobrod, B M, Gorshkov, V N, Lizon, D C, Moody, D I, Nguyen, D C, Torous, S V
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.06.2009
Subjects
Atmospheres
Atmospheric turbulence
Computer simulation
Diffusers
Phase modulation
Physics - Computational Physics
Physics - Optics
Reduction
Scintillation
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Summary:We demonstrate experimentally and numerically that the application of a partially coherent beam (PCB) in combination with time averaging leads to a significant reduction in the scintillation index. We use a simplified experimental approach in which the atmospheric turbulence is simulated by a phase diffuser. The role of the speckle size, the amplitude of the phase modulation, and the strength of the atmospheric turbulence are examined. We obtain good agreement between our numerical simulations and our experimental results. This study provides a useful foundation for future applications of PCB-based methods of scintillation reduction in physical atmospheres.
ISSN:2331-8422
DOI:10.48550/arxiv.0906.4576