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Proceedings Paper

Laser induced defect decrement in DKDP crystals varied with photon energy
Author(s): Yueliang Wang; Yuanan Zhao; Meiping Zhu; Guohang Hu; Liujiang Yang; Dawei Li; Xiaofeng Liu; Qiling Xiao
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Paper Abstract

In this paper, laser induced reactions of bulk defects in DKDP crystals were real-time detected by ultra-microscopy while high power laser irradiation with different photon energy, and the defect elimination processes were observed. It’s found that there were two kinds of bulk defects that can be eliminated: submicron-scale defect and nanoscale defect clusters. The decrement of submicron-scale defects was related to the laser parameters, such as laser fluence and photon energy. The defect decrement could achieve its maximum value at appropriate laser fluence, while the photon energy was fixed. It indicated that up to ~47% of defects could be eliminated by laser irradiation at 3.50eV (355nm). While the laser fluence was fixed, the amount of defects reduced by laser irradiation at 3.50eV was larger than that at 1.17eV (1064nm). The nanoscale defect clusters were hard to be eliminated by laser irradiation at 1.17eV, while most of them could be reduced by laser irradiation at 3.50eV.

Paper Details

Date Published: 22 September 2014
PDF: 4 pages
Proc. SPIE 9238, Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers, 923807 (22 September 2014); doi: 10.1117/12.2073589
Show Author Affiliations
Yueliang Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Yuanan Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Meiping Zhu, Shanghai Institute of Optics and Fine Mechanics (China)
Guohang Hu, Shanghai Institute of Optics and Fine Mechanics (China)
Liujiang Yang, Shanghai Institute of Optics and Fine Mechanics (China)
Dawei Li, Shanghai Institute of Optics and Fine Mechanics (China)
Xiaofeng Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Qiling Xiao, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9238:
Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers
Takahisa Jitsuno; Jianda Shao; Wolfgang Rudolph, Editor(s)

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