Dynamic 193-nm optical properties of water

Paul T. Staveteig, Joseph T. Walsh

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Previous assumptions that water is not a 193-nm chromophore during ArF excimer laser tissue ablation are based on room-temperature data and ignore spectroscopic literature that suggests a strong temperature dependence of far-ultraviolet water absorption. By the use of a Q-switched Er:YAG laser as a pump source and an ArF excimer laser as a probe source, thermal generation and relaxation of 193-nm water absorption were characterized under nonequilibrium high-temperature and highpressure conditions. At volumetric energy densities as small as 2 kJ/cm3 relative to room temperature, the 193-nm absorption coefficient of water was measured to increase by more than 5 orders of magnitude. These results are consistent with the hypothesis that the absorption of 193-nm radiation by water may play a role in ArF excimer laser ablation of tissue.

Original languageEnglish (US)
Pages (from-to)3392-3403
Number of pages12
JournalApplied optics
Volume35
Issue number19
DOIs
StatePublished - Jul 1 1996

Keywords

  • Dynamic optical properties
  • Excimer laser ablation
  • Hydrogen bonding
  • Laser–tissue interaction
  • Nonlinear absorption
  • Water

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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