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Modified quadratic approximation of two-point spherical wave structure function in atmospheric turbulence
Author(s): Youquan Dan; Hua Wu; Peiyu Sun; Yi Luo
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Paper Abstract

For the two-point spherical wave structure function, we propose a modified quadratic approximation, which can be used to investigate the second-order coherence properties (such as the beam spreading, average intensity, cross-spectral density function) of partially coherent beams through the turbulent atmosphere. We prove that the modified quadratic approximation, different from usual one, can be used to study the effects of inner and outer scales of turbulence, and is better than the usual one for a less coherent beam or for a very strong turbulence. A more accurately analytical expression for average intensity of Gaussian-Schell model beams is derived based on the modified quadratic approximation. These results are also illustrated by investigating the average intensity for Gaussian-Schell model beams in turbulence.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 1133827 (18 December 2019); doi: 10.1117/12.2547410
Show Author Affiliations
Youquan Dan, Civil Aviation Flight Univ. of China (China)
Hua Wu, Civil Aviation Flight Univ. of China (China)
Peiyu Sun, Civil Aviation Flight Univ. of China (China)
Yi Luo, Civil Aviation Flight Univ. of China (China)


Published in SPIE Proceedings Vol. 11338:
AOPC 2019: Optical Sensing and Imaging Technology
John E. Greivenkamp; Jun Tanida; Yadong Jiang; HaiMei Gong; Jin Lu; Dong Liu, Editor(s)

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