Combined modulation to incident laser by subsurface crack and contaminant on fused silica

Hairong Wang, Zhi Chen, Huapan Xiao, Rongguang Liang, Na Yu, Jiuhong Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Subsurface defects and contaminations will be generated during the grinding and polishing processes of optical components. Combined modulation is one of the important factors for the laser-induced damages of fused silica. In this paper, by using 2D finite-difference time-domain method, the light intensity distribution modulated by both radial crack and contaminant is studied on front/rear surface, respectively. The results show that the light intensity distribution is significantly affected by the aspect ratio of radial crack and the relative position between radial crack and contaminant. The simulations of the combined modulation on rear surface show that larger LIEFs are generated at certain relative positions compared with those in the single modulation of radial crack or contaminant. Meanwhile, with the increase of distance, the LIEFs are wave-like up and down fluctuations, and gradually tend to stable values. When there is no total internal reflection, the LIEF in contaminant on the crack wall rises significantly with increase of distance, the maximum LIEF occurs when the contaminant is near the intersecting line between radial crack and rear surface. The simulation of the combined modulation on front surface show that the variation of LIEFs in global domain are not very prominent.

Original languageEnglish (US)
Title of host publicationPacific-Rim Laser Damage 2018
Subtitle of host publicationOptical Materials for High-Power Lasers
EditorsWolfgang Rudolph, Takahisa Jitsuno, Jianda Shao
PublisherSPIE
ISBN (Electronic)9781510619920
DOIs
StatePublished - Jan 1 2018
Event8th Pacific-Rim Laser Damage 2018: Optical Materials for High-Power Lasers, PLD 2018 - Yokohama, Japan
Duration: Apr 24 2018Apr 27 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10713
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

Other8th Pacific-Rim Laser Damage 2018: Optical Materials for High-Power Lasers, PLD 2018
CountryJapan
CityYokohama
Period4/24/184/27/18

Keywords

  • contaminant
  • crack
  • fused silica
  • light intensity enhancement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Wang, H., Chen, Z., Xiao, H., Liang, R., Yu, N., & Wang, J. (2018). Combined modulation to incident laser by subsurface crack and contaminant on fused silica. In W. Rudolph, T. Jitsuno, & J. Shao (Eds.), Pacific-Rim Laser Damage 2018: Optical Materials for High-Power Lasers [1071312] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10713). SPIE. https://doi.org/10.1117/12.2316783