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  • Received: Sep. 24, 2019

    Accepted: Dec. 11, 2019

    Posted: Feb. 20, 2020

    Published Online: Feb. 20, 2020

    The Author Email: Hongji Qi (, Jianda Shao (

    DOI: 10.1017/hpl.2019.54

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    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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High Power Laser Science and Engineering, Vol. 8, Issue 1, 010000e6 (2020)

Rapid growth of a long-seed KDP crystal

Duanyang Chen1,2, Bin Wang1, Hu Wang1, Xiangyu Zhu3, Ziyuan Xu1, Yuanan Zhao1, Shenghao Wang1, Kaizao Ni1, Lili Zheng3, Hui Zhang4, Hongji Qi1,†, and Jianda Shao1,†

Author Affiliations

  • 1Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
  • 3School of Aerospace Engineering, Tsinghua University, Beijing100084, China
  • 4Department of Engineering Physics, Tsinghua University, Beijing100084, China


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.


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