Characterization of plasma in microwelding of glass using ultrashort laser pulse at high pulse repetition rates

I. Miyamoto, Y. Okamoto, R. Tanabe, Y. Ito

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

Dynamic behavior of plasma in internal modification of glass using fs-laser pulses with high pulse repetition rates up to 1MHz is observed using high-speed video camera at 50,000 frames per second. High-speed pictures reveal striking fact that the localized plasma is produced with size much smaller than reported in literatures before, and changes its location, size, shape and brightness periodically at repetition rates of the order of kHz. The mechanism responsible for producing localized plasma and its long-term periodic motion is presented based on the analysis of free-electron density based on rate equation.

Original languageEnglish
Pages (from-to)973-982
Number of pages10
JournalPhysics Procedia
Volume56
Issue numberC
DOIs
Publication statusPublished - Jan 1 2014
EventInternational Conference on Laser Assisted Net Shape Engineering, LANE 2014 - Furth, Germany
Duration: Sep 8 2014Sep 11 2014

Keywords

  • Critical electron density
  • Free-electron density
  • High-speed camer
  • Microwelding
  • Nonlinear absorption
  • Rate equation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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