Effect of fused silica subsurface defect site density on light intensification

doi:10.1088/1674-1056/22/5/054207

Abstract The effect of defect density on the modulation of incident laser waves is investigated. First, based on the actual defect distribution in the subsurface of fused silica, a three-dimensional (3D) grid model of defect sites is constructed. The 3D finite-difference time-domain method is developed to solve the Maxwell equations. Then the electrical field intensity in the vicinity of the defect sites in the subsurface of fused silica is numerically calculated. The relationships between the maximal electrical field intensity in fused silica and the geometry of the defect sites are given. The simulated results reveal that the modulation becomes more remarkable with an increase of the defect density. In addition, the effect of the distribution mode of defects on modulation is discussed. Meanwhile, the underlying physical mechanism is analyzed in detail.

Keywords: defect site density laser-induced damage fused silica

Received: 18 August 2012
Revised: 17 October 2012
Accepted manuscript online:

PACS:	42.60.Jf	(Beam characteristics: profile, intensity, and power; spatial pattern formation)
	42.62.-b	(Laser applications)
	42.70.Ce	(Glasses, quartz)
	46.15-x

Fund: Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. ZYGX2010J045), the National Natural Science Fundation of China and the China Academy of Engineering Physics United Foundation (NSFA) (Grant No. 11076008).

Corresponding Authors: Li Li
E-mail: jasmine2008@uestc.edu.cn

Cite this article:

Li Li (李莉), Xiang Xia (向霞), Yuan Xiao-Dong (袁晓东), He Shao-Bo (贺少勃), Jiang Xiao-Dong (蒋晓东), Zheng Wan-Guo (郑万国), Zu Xiao-Tao (祖小涛) Effect of fused silica subsurface defect site density on light intensification 2013 Chin. Phys. B 22 054207

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Effect of fused silica subsurface defect site density on light intensification

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