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Proceedings Paper

Laser-flash photographic studies of Er:YAG laser ablation of water
Author(s): Steven L. Jacques; Gary Gofstein
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Paper Abstract

Photographic studies of pulsed infrared laser irradiation of a pure water target illustrate two aspects of mass removal: (1) surface evaporation, and (2) explosive vaporization. A pulsed Erbium:YAG laser provided radiation at a 2.9-micrometers wavelength for delivery to the target site and triggered a second visible laser (nitrogen/dye laser) for illumination of the target site for photography. A variable time delay between the Er:YAG and dye lasers allowed selection of the time of the photograph (>=1 microsecond(s) ). The photographs distinguish between (1) rapid surface evaporation when the energy deposition achieves high temperatures but does not supply the full enthalpy of vaporization, and (2) explosive vaporization of water when the entire enthalpy of vaporization has been provided by the laser pulse.

Paper Details

Date Published: 1 June 1991
PDF: 5 pages
Proc. SPIE 1427, Laser-Tissue Interaction II, (1 June 1991); doi: 10.1117/12.44090
Show Author Affiliations
Steven L. Jacques, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Gary Gofstein, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 1427:
Laser-Tissue Interaction II
Steven L. Jacques, Editor(s)

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