title: Enhancement of the beam quality of non-uniform output slab laser amplifier with a 39-actuator rectangular piezoelectric deformable mirror.
abstract: We present a slab laser amplifier beam cleanup experimental system based on a 39-actuator rectangular piezoelectric deformable mirror. Rather than use a wave-front sensor to measure distortions in the wave-front and then apply a conjugation wave-front for compensating them, the system uses a Stochastic Parallel Gradient Descent algorithm to maximize the power contained within a far-field designated bucket. Experimental results demonstrate that at the output power of 335W, more than 30% energy concentrates in the 1x diffraction-limited area while the beam quality is enhanced greatly.
authors.affiliation: The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China. pingyang2516@163.com
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: Yu
authors.initials: Y
authors.lastname: Ning
authors.forename: Xiang
authors.initials: X
authors.lastname: Lei
authors.forename: Bing
authors.initials: B
authors.lastname: Xu
authors.forename: Xinyang
authors.initials: X
authors.lastname: Li
authors.forename: Lizhi
authors.initials: L
authors.lastname: Dong
authors.forename: Hu
authors.initials: H
authors.lastname: Yan
authors.forename: Wenjing
authors.initials: W
authors.lastname: Liu
authors.forename: Wenhan
authors.initials: W
authors.lastname: Jiang
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.forename: Xingbo
authors.initials: X
authors.lastname: Liang
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Tang