title: Partially coherent flattened Gaussian beam and its paraxial propagation properties.
abstract: A simple model called partially coherent flattened Gaussian beam (FGB) is proposed to describe a partially coherent beam with a flat-topped spatial profile. An explicit and analytical formula is derived for the cross-spectral density of a partially coherent FGB propagating through a paraxial ABCD optical system. The propagation factor and propagation properties of a partially coherent FGB in free space are studied in detail and found to be closely related to its coherence and beam order.
authors.affiliation: Joint Research Center of Photonics of the Royal Institute of Technology and Zhejiang University, Hangzhou, China. yangjian_cai@yahoo.com.cn
authors.forename: Yangjian
authors.initials: Y
authors.lastname: Cai
authors.forename: Sailing
authors.initials: S
authors.lastname: He