Ultrashort pulse laser ablation of biological tissue

B. M. Kim, M. D. Feit, A. M. Rubenchik, D. M. Gold, B. C. Stuart, L. B. Da Silva

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Temperature and shock wave propagation in water (as a model of tissue) irradiated by sub-picosecond and nanosecond pulses were modeled. The high temperature and pressure generated during sub-picosecond irradiation did not penetrate deeply into the water due to quickly ejected plasma while significant pressure and temperature increases were observed in deep regions with nanosecond pulses. Knowing that the sub-picosecond pulses are effective for tissue ablation, additional studies were done to examine the effect of short pulse widths (< 20 ps). Ablation threshold, temperature rise and ablation crater quality on human dentine were investigated for different pulse widths in the range of 150 fs - 20 ps. The ablation threshold fluence was approximately 4 times higher with 20 ps pulses than with 150 fs pulses but the quality of the ablation craters were not significantly different in this pulse width range.

Original languageEnglish
Pages (from-to)203-210
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3254
DOIs
Publication statusPublished - 1998
Externally publishedYes
EventLaser-Tissue Interaction IX - San Jose, CA, United States
Duration: 1998 Jan 261998 Jan 28

Keywords

  • Laser-tissue interaction modeling
  • Pulse width effect
  • Tissue ablation
  • Ultrashort pulse lasers

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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