Şahin, SerkanZhang, MinghuiChen, YahongCai, Yangjian2021-03-202021-03-2020181084-75291520-8532http://doi.org/10.1364/JOSAA.35.001604https://hdl.handle.net/20.500.12885/782We derive analytical expressions for the cross-spectral density matrix of polychromatic electromagnetic multi-Gaussian Schell-model (EMGSM) beam transmission through a gradient-index fiber. The space-spectrum evolution properties for the spectral density, spectral shift, degree of polarization, and electromagnetic coherence state of a polychromatic EMGSM beam with Lorentzian line type spectrum and central wavelength lambda(0) = 1550 nm propagation in a silica-clad germania core inhomogeneous graded-index fiber are studied in detail. We show that these statistical properties exhibit periodicity in the fiber, caused by the focusing property of square-law media, which can be reminiscent of the self-imaging effect of optical fields. The effects of the non-conventional correlation functions of the polychromatic EMGSM beam on the transmission properties are also investigated. (c) 2018 Optical Society of Americaeninfo:eu-repo/semantics/closedAccess[No Keywords]Article10.1364/JOSAA.35.00160435916041611WOS:00044326020001630183017Q3Q2