High Power Laser Science and Engineering, 2020, 8 (1): 010000e6, Published Online: Feb. 20, 2020  

Rapid growth of a long-seed KDP crystal Download: 566次

Author Affiliations
1 Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
3 School of Aerospace Engineering, Tsinghua University, Beijing100084, China
4 Department of Engineering Physics, Tsinghua University, Beijing100084, China
Abstract
To reduce the seed length while maintaining the advantages of the cuboid KDP-type crystal, a long-seed KDP crystal with size $471~\text{mm}\times 480~\text{mm}\times 400~\text{mm}$ is rapidly grown. With almost the same high cutting efficiency to obtain third harmonic generation oriented samples, this long-seed KDP-type crystal can be grown with a shorter seed than that of the cuboid KDP-type crystal. The full width at half maximum of the high-resolution X-ray diffraction of the (200) crystalline face is 28.8 arc seconds, indicating that the long-seed KDP crystal has good crystalline quality. In the wavelength range of 377–1022 nm, the transmittance of the long-seed KDP crystal is higher than 90%. The fluence for the 50% probability of laser-induced damage (LID) is $18.5~\text{J}/\text{cm}^{2}$ (3 ns, 355 nm). Several test points survive when the laser fluence exceeds $30~\text{J}/\text{cm}^{2}$ (3 ns, 355 nm), indicating the good LID performance of the long-seed KDP crystal. At present, the growth of a long-seed DKDP crystal is under way.

Duanyang Chen, Bin Wang, Hu Wang, Xiangyu Zhu, Ziyuan Xu, Yuanan Zhao, Shenghao Wang, Kaizao Ni, Lili Zheng, Hui Zhang, Hongji Qi, Jianda Shao. Rapid growth of a long-seed KDP crystal[J]. High Power Laser Science and Engineering, 2020, 8(1): 010000e6.

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