Beam wavefront dynamical compensation by aberrations of the gain medium in laser amplifiers for beam quality improvement.
Beam wavefront dynamical compensation by aberrations of the gain medium in laser amplifiers for beam quality improvement.
复制标题
DOI：
10.1364/ol.39.002537
复制
发表时间：
2014-05
期刊：
影响因子：
3.6
通讯作者：
Chong Liu;Yi Wang;Z. Ye;Zhigang Zhao;Z. Xiang
中科院分区：
文献类型：
--
作者：
Chong Liu;Yi Wang;Z. Ye;Zhigang Zhao;Z. Xiang
A method is presented to dynamically improve the beam quality in laser amplifiers by spherical aberration compensation. By imaging the field with a negative spherical aberration into a laser amplifier, the wavefront aberration of an input beam could be compensated by that of the gain medium in the amplifier with positive spherical aberration. Both power amplification and beam quality improvement can be achieved simultaneously. No additional optical components are introduced. Experiments are conducted for a beam from an oscillator with 28 W output power. The M2 factor of the beam was improved from 4.2 to 1.6 after amplification. The power was also amplified to 54.7 W. It is a cost-effective and passive way for wavefront compensation, as compared to deformable mirrors and phase corrector plates.
