Mechanism of dynamic plasma motion in internal modification of glass by fs-laser pulses at high pulse repetition rate

Isamu Miyamoto, Yasuhiro Okamoto, Rie Tanabe, Yoshiro Ito, Kristian Cvecek, Michael Schmidt

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Evolution of free-electron density in internal modification of glass by fs-laser pulses at high pulse repetition rates is simulated based on rate equation model, which is coupled with thermal conduction model in order to incorporate the effect of thermal ionization. Model shows that highly absorbing small plasma generated near the geometrical focus moves toward the laser source periodically to cover the region, which is much larger than focus volume. The simulated results agree qualitatively with dynamic motion of plasma produced in internal modification of borosilicate glass by fs-laser pulses at 1 MHz through the observation using high-speed video camera. The paper also reveals the physical mechanism of the internal modification of glass when heat accumulation is significant.

Original languageEnglish
Pages (from-to)25718-25731
Number of pages14
JournalOptics Express
Volume24
Issue number22
DOIs
Publication statusPublished - Oct 31 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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