Effect of UV Laser Conditioning on the Structure of KDP CrystalReport as inadecuate




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Advances in Condensed Matter Physics - Volume 2014 2014, Article ID 451048, 7 pages -

Research Article

Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received 17 March 2014; Accepted 3 June 2014; Published 18 June 2014

Academic Editor: Wanguo Zheng

Copyright © 2014 Decheng Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Multiparametric raster scanning experiments for KDP crystals are carried out to study the laser conditioning efficiency as a function of laser fluence, fluence step, and pulse sequence by using ultraviolet UV laser irradiation with pulse duration of approximately 7 ns. It indicates that damage resistance of KDP can be enhanced after conditioning process. And laser conditioning efficiency depends on the maximal fluence which is below the damage threshold. Raman spectra and photothermal absorption have also been studied on KDP crystals before and after multiparametric laser conditioning. Photothermal absorption data reveal that absorbance of conditioned KDP crystal decreases with the increase of laser fluence and the damage threshold of low absorption area is higher. Raman analysis reveals that the effectiveness of laser conditioning relies mainly on the individual mode of PO4 molecule.





Author: Decheng Guo, Xiaodong Jiang, Jing Huang, Fengrui Wang, Hongjie Liu, and Xiaotao Zu

Source: https://www.hindawi.com/



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