Open AccessPropagation of a partially coherent Lorentz-Gauss beam through a paraxial ABCD optical system
Author(s) -
Guoquan Zhou
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.004637
Subject(s) - paraxial approximation , degree of coherence , physics , optics , coherence (philosophical gambling strategy) , lorentz transformation , fresnel number , beam (structure) , gaussian , coherence theory , m squared , beam diameter , coherence length , quantum mechanics , diffraction , laser beams , laser , superconductivity
Based on the generalized Huygens-Fresnel integral and the Hermite-Gaussian expansion of a Lorentz distribution, analytical expressions for the mutual coherence function, the effective beam size, and the spatial complex degree of coherence of a partially coherent Lorentz-Gauss beam through a paraxial and real ABCD optical system are derived, respectively. As a numerical example, the focusing of a partially coherent Lorentz-Gauss beam is considered. The normalized intensity distribution, the effective beam size, and the spatial complex degree of coherence for the focused partially coherent Lorentz-Gauss beam are numerically demonstrated in the focal plane. The influence of the spatial coherence length on the normalized intensity distribution, the effective beam size, and the spatial complex degree of coherence is mainly discussed.