Virtual sources for a cosh-Gaussian beam.
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.
Zhang
Yucheng
Y
Department of Information Science and Technology, Xichang College, Xichang 615000, China. zyc89514375@163.com
Song
Yuanjun
Y
Chen
Zongrong
Z
Ji
Jianhua
J
Shi
Zhixiong
Z