High-quality near-field beam achieved in a high-power laser based on SLM adaptive beam-shaping system

• DOI: 10.1364/oe.23.000681
• Publication Date: 2015-01-12T22:30:44Z
• Authors: Sensen Li; Yulei Wang; Zhiwei Lu; Lei Ding; Pengyuan Du; Yi Chen; Zhenxing Zheng; Dexin Ba; Yongkang Dong; Hang Yuan; Zhenxu Bai; Zhaohong Liu; Can Cui
• Keywords: 0103 physical sciences; 01 natural sciences

We demonstrate a high-power laser system with a high-quality near-field beam by using a liquid-crystal spatial light modulator (SLM). An efficient spatial beam shaping algorithm is discussed which can improve the output nearfield beam quality effectively. Both small-signal and large-signal amplification situation of the laser are considered in the beam shaping algorithm. The experimental results show that the near field fluence modulation of output is improved from 1.99:1 to 1.26:1 by using the liquid-crystal SLM. Obvious uniform spatial fluence distribution and near-field beam quality improvement are observed.