Yang Ping, Ning Yu, Lei Xiang, Xu Bing, Li Xinyang, Dong Lizhi, Yan Hu, Liu Wenjing, Jiang Wenhan, Liu Lei, Wang Chao, Liang Xingbo, Tang Xiaojun
The Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China.
Opt Express. 2010 Mar 29;18(7):7121-30. doi: 10.1364/OE.18.007121.
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.
我们展示了一种基于39个驱动器矩形压电变形镜的片状激光放大器光束净化实验系统。该系统并非使用波前传感器来测量波前畸变，然后应用共轭波前来补偿它们，而是采用随机并行梯度下降算法，以使远场指定区域内包含的功率最大化。实验结果表明，在335W的输出功率下，超过30%的能量集中在1倍衍射极限区域内，同时光束质量得到了极大提升。
