Turbulence-induced changes in degree of polarization, degree of coherence and spectrum of partially coherent electromagnetic beams |
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| Authors: | Ji Xiao-Ling and Pu Zheng-Cai |
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| Affiliation: | College of Physics, Sichuan Normal University, Chengdu 610068, China |
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| Abstract: | Based on a recently formulated unified theory of coherence
and polarization, a method is described to study turbulence-induced
changes in the polarization, the coherence and the spectrum of
partially coherent electromagnetic beams on propagation. The
electromagnetic Gaussian Schell-model beam is taken as a typical
example of partially coherent electromagnetic beams, and the
closed-form expressions for the degree of polarization, the degree
of coherence and the spectrum of electromagnetic Gaussian
Schell-model beams propagating through atmospheric turbulence are
derived in the quadratic approximation of Rytov's phase structure
function. Some interesting results are obtained, which are
illustrated by numerical examples and are explained in physics. |
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| Keywords: | unified theory of coherence and polarization turbulence partially coherent electromagnetic beams degree of polarization degree of
coherence spectrum |
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