Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching

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

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

Abstract

Chemical etching is usually utilized to improve the laser damage performance of optical glass by mitigating microcracks, while it inevitably produces some reaction products (RPs). In this paper, two K9 glasses with good quality and two K9 glasses with micro-cracks are etched, statically or dynamically (high-frequency ultrasonic agitation). The morphologies of cracks and RPs are characterized, and the laser-induced damage thresholds (LIDTs) are measured. The results show that with the increase of etching time, the LIDT increases slightly at first and then decreases gradually for the glass with RPs, and the LIDT increases at first and then stabilizes for the glass without RPs. Using finite-difference time-domain method, the light intensities around crack, RP and their combination are simulated, respectively. The results indicate that the light intensity enhancement factor (LIEF) increases at first and then decreases with the decrease of crack aspect ratio, and the LIEF increases with RP radius. The LIEF for the combination is generally larger than that for one crack or one RP, which greatly depends on the relative distance between the crack and the RP. Experimental and simulated results complement each other, revealing the influence mechanism of crack and RP on the LIDT. This work would contribute to improving the LIDT of optical glass by chemical etching.

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 - 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

  • chemical etching
  • laser damage
  • light intensity
  • micro-crack
  • optical glass

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

    Xiao, H., Chen, Z., Wang, H., Liang, R., Yu, N., & Wang, J. (2018). Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching. In W. Rudolph, T. Jitsuno, & J. Shao (Eds.), Pacific-Rim Laser Damage 2018: Optical Materials for High-Power Lasers [1071309] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10713). SPIE. https://doi.org/10.1117/12.2316622