Laser-flash photographic studies of Er:YAG laser ablation of water

Steven L. Jacques; Gary Gofstein

doi:10.1117/12.44090

1 June 1991 Laser-flash photographic studies of Er:YAG laser ablation of water

Steven L. Jacques, Gary Gofstein

Proceedings Volume 1427, Laser-Tissue Interaction II; (1991) https://doi.org/10.1117/12.44090
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

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.

Citation Download Citation

Steven L. Jacques and Gary Gofstein "Laser-flash photographic studies of Er:YAG laser ablation of water", Proc. SPIE 1427, Laser-Tissue Interaction II, (1 June 1991); https://doi.org/10.1117/12.44090

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