title: Automatic low-order aberration correction based on geometrical optics for slab lasers.
abstract: In this paper, we present a method based on geometry optics to simultaneously correct low-order aberrations and reshape the beams of slab lasers. A coaxial optical system with three lenses is adapted. The positions of the three lenses are directly calculated based on the beam parameters detected by wavefront sensors. The initial sizes of the input beams are 1.8  mm×11  mm, and peak-to-valley (PV) values of the wavefront range up to several tens of microns. After automatic correction, the dimensions may reach nearly 22  mm×22  mm as expected, and PV values of the wavefront are less than 2 μm. The effectiveness and precision of this method are verified with experiments.
authors.forename: Xin
authors.initials: X
authors.lastname: Yu
authors.forename: Lizhi
authors.initials: L
authors.lastname: Dong
authors.forename: Boheng
authors.initials: B
authors.lastname: Lai
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: Yong
authors.initials: Y
authors.lastname: Liu
authors.forename: Qingfeng
authors.initials: Q
authors.lastname: Kong
authors.forename: Kangjian
authors.initials: K
authors.lastname: Yang
authors.forename: Guomao
authors.initials: G
authors.lastname: Tang
authors.forename: Bing
authors.initials: B
authors.lastname: Xu