Modified quadratic approximation of two-point spherical wave structure function in atmospheric turbulence

Youquan Dan; Hua Wu; Peiyu Sun; Yi Luo

doi:10.1117/12.2547410

18 December 2019 Modified quadratic approximation of two-point spherical wave structure function in atmospheric turbulence

Youquan Dan, Hua Wu, Peiyu Sun, Yi Luo

Author Affiliations +

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 1133827 (2019) https://doi.org/10.1117/12.2547410
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

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.

Citation Download Citation

Youquan Dan, Hua Wu, Peiyu Sun, and Yi Luo "Modified quadratic approximation of two-point spherical wave structure function in atmospheric turbulence", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 1133827 (18 December 2019); https://doi.org/10.1117/12.2547410

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