We propose and demonstrate a spatial beam shaping method to achieve high-quality near-field for a high-power frequency tripling laser system by using a liquid crystal spatial light modulator (SLM). Considering the nonlinear relationship between the output 3ω intensity and the input 1ω intensity of the frequency conversion system and the transmittance nonuniformity of the whole laser system, we introduce an efficient spatial beam shaping method that improves the output near-field beam quality of frequency tripling laser dramatically. Results show that the near-field peak-to-mean value of the frequency tripling laser improves from 1.83:1 to 1.42:1 after spatial beam shaping within four shots. This method provides effective guidance for spatial beam shaping of high-power frequency tripling laser systems.
|Number of pages||5|
|State||Published - 15 May 2016|
Bibliographical noteFunding Information:
The authors appreciate the efforts of the following students at the Harbin Institute of Technology who have been instrumental in the success of this project: Xin Wang, Jianhui Zhang, Penghua Zhao, Mengzhi Sun, Ze Cheng, Meihui Yang, Linpeng Yu, Xiaoyan Liu, Fang Yang, XinMin Fan, Baoshen Jia, Zhaoming Zhong, Ying Liu, Dengwang Zhou, Xingbo Han, Xiang Lin, Qilin Gao and Yuefei Cai. This research is supported by the project of the National Natural Science Foundation of China under Grant nos. 61378007 and 61138005 .
© 2016 Elsevier B.V. All rights reserved.
- Active or adaptive optics
- Harmonic generation and mixing
- Laser beam shaping
- Spatial light modulators