Influence of anisotropic turbulence on the Second-order statistics of a general-type partially coherent beam in the ocean

• Published in: Optics communications Vol. 438; pp. 46 - 53
• Main Authors: Fu, Wenyu, Zheng, Xingrong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2019
• Subjects: Anisotropy; General-type partially coherent beams; Oceanic turbulence; Statistical properties; General-type partially coherent beams; Oceanic turbulence; Statistical properties; Anisotropy
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2018.12.089

We investigate detailedly evolution properties of the angular spread and propagation factor (M2-factor) of a general-type partially coherent beam with Schell-model correlator in anisotropic oceanic turbulence. According to the extended Huygens–Fresnel principle, analytical expressions for the second-order moments of Wigner distribution function (WDF) in anisotropic oceanic turbulence are derived. In order to measure the resistance of a general partially coherent beam to effects of anisotropic oceanic turbulence, we introduce deviation percentage of the normalized angular spread and M2-factor respectively between the general-type partially coherent beam and conventional Gaussian Schell-model (GSM) beam. Numerical results show that influence of anisotropy on the angular spread and M2-factor is less for a general-type partially coherent beam than a conventional GSM beam in oceanic turbulence. Besides, the initial beam parameters have a significant effect on the angular spread and M2-factor of a general-type partially coherent beam. Our results may be useful for underwater communication.