title: Virtual sources for a cosh-Gaussian beam.
abstract: On the basis of superposition of beams, a group of virtual sources that generate a cosh-Gaussian wave is identified. A closed-form expression is derived for this cosh-Gaussian wave, which, in the appropriate limit, yields the paraxial approximation for the cosh-Gaussian beam. From this expression, the paraxial approximation and the nonparaxial corrections of all orders for the corresponding paraxial cosh-Gaussian beam are determined.
authors.affiliation: Department of Information Science and Technology, Xichang College, Xichang 615000, China. zyc89514375@163.com
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yuanjun
authors.initials: Y
authors.lastname: Song
authors.forename: Zongrong
authors.initials: Z
authors.lastname: Chen
authors.forename: Jianhua
authors.initials: J
authors.lastname: Ji
authors.forename: Zhixiong
authors.initials: Z
authors.lastname: Shi