title: Coherent and incoherent combination of Gaussian beams employing lens array distributed on the spherical chamber.
abstract: Coherent and incoherent combination of Gaussian beams employing a lens array distributed on the spherical chamber is theoretically analyzed. The output field of each source in the array is coupled through an individual optical system whose local optical axis coincides with the radial direction of the chamber. The resulting intensity profile near the origin is derived. The intensity profile and power in the bucket on the target for rectangular and hexagonal arrangement are numerically calculated. The influences of the center-to-center separation and the ring number of the focusing lens array are given. The synthetic intensity profile of incoherent combination changes little for a lens array scale much smaller than the chamber size. In contrast, the synthetic intensity profile of coherent combination shows an interference pattern with a sharp central peak and sidelobes.
authors.affiliation: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Huang
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Wei
authors.forename: Mingzhong
authors.initials: M
authors.lastname: Li
authors.forename: Jianjun
authors.initials: J
authors.lastname: Wang
authors.forename: Honghuan
authors.initials: H
authors.lastname: Lin
authors.forename: Dangpeng
authors.initials: D
authors.lastname: Xu
authors.forename: Ying
authors.initials: Y
authors.lastname: Deng
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang