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Laser conditioning mechanism in DKDP crystals analyzed by fluorescence and stimulated Raman scattering technique
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Paper Abstract

In order to analyze the mechanism of damage threshold enhancement after laser conditioning, the stimulated Raman scattering and fluorescent properties of un-conditioned and laser conditioned of DKDP crystals were compared in detail. It revealed that the intensity of Raman scattering peak 921cm-1 were slightly lowered, and the intensity of fluorescence was much decreased, especially the fluorescence below 400nm, after nanosecond laser conditioning. Moreover, the intensity of fluorescence could be further decreased after sub-nanosecond laser conditioning. The slightly variation of Raman scattering proved the modification of the PO4 vibrational modes. The sharply decrease of fluorescence intensity below 400 nm reflected the density reduction of electron defects in these crystals. On the basis of the above analysis, laser conditioning mechanism in DKDP crystals was discussed.

Paper Details

Date Published: 8 July 2019
PDF: 6 pages
Proc. SPIE 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers, 1106304 (8 July 2019); doi: 10.1117/12.2540636
Show Author Affiliations
Yao Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Key Lab. of Materials for High Power Laser (China)
Jianda Shao, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)
Guohang Hu, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)
Yuanan Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)
Zhen Cao, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Key Lab. of Materials for High Power Laser (China)
Dawei Li, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)
Xiaofeng Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)
Hongbo He, Shanghai Institute of Optics and Fine Mechanics (China)
Key Lab. of Materials for High Power Laser (China)


Published in SPIE Proceedings Vol. 11063:
Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

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