Time-Resolved Pump–Probe Imaging of Ablation Phenomena in Silica Glass Using Visible Femtosecond Laser

E. Terasawa*, D. Satoh, T. Shibuya, Y. Moriai, H. Ogawa, M. Tanaka, K. Sakaue, M. Washio, Y. Kobayashi, R. Kuroda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The ablation phenomena in silica glass were investigated using a visible femtosecond laser and time-resolved pump–probe imaging. A pump pulse with a wavelength of 400 nm was employed. Only gentle ablation occurred at a peak fluence of 6.88 J/cm2, and gentle ablation and strong ablation occurred at a peak fluence of 8.23 J/cm2. At both peak fluences, reflectivity increased owing to excitation at a delay time of ~1 ps. At a delay time of ~30 ps, a decrease in reflectivity due to melting was observed only at the local fluence that generated strong ablation. The ablation that occurred after melting was considered to correspond to strong ablation. Similar changes in reflectivity were observed for two values of the local fluence that corresponded to gentle ablation

Original languageEnglish
Pages (from-to)194-198
Number of pages5
JournalJournal of Laser Micro Nanoengineering
Volume16
Issue number3
DOIs
Publication statusPublished - 2021

Keywords

  • Femtosecond laser ablation
  • Laser processing
  • Pump–probe imaging
  • Silica glass
  • Visible wavelength

ASJC Scopus subject areas

  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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