Enhancement of the beam quality of non-uniform output slab laser amplifier with a 39-actuator rectangular piezoelectric deformable mirror.
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.
Yang
Ping
P
The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China. pingyang2516@163.com
Ning
Yu
Y
Lei
Xiang
X
Xu
Bing
B
Li
Xinyang
X
Dong
Lizhi
L
Yan
Hu
H
Liu
Wenjing
W
Jiang
Wenhan
W
Liu
Lei
L
Wang
Chao
C
Liang
Xingbo
X
Tang
Xiaojun
X