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Applied Physics B

, Volume 52, Issue 3, pp 217–224 | Cite as

Measurement of Er:YAG laser ablation plume dynamics

  • J. T. WalshJr.
  • T. F. Deutsch
Article

Abstract

The dynamics of tissue ablation using an Er:YAG laser were studied using flash photography and optical pump-probe techniques. Both normal-spiking-mode and Q-switched Er:YAG laser radiation were used to study the ablation of skin and bone. Time-resolved photographs of the ablation plume were obtained using a microscope-mounted camera together with pulsed illumination from an excimer-pumped dye laser. The velocity of the plume front, obtained from the photographs, was approximately 1400 m/s. The same velocity was also measured using an optical pump-probe technique. Both techniques indicate that material removal occurred after the end of the 90-ns-long Q-switched laser pulse and that each micropulse in the normal-spiking-mode pulse train was capable of ablating and rapidly ejecting tissue.

PACS

87.60Gp 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • J. T. WalshJr.
    • 1
  • T. F. Deutsch
    • 1
  1. 1.Wellman Laboratories of Photomedicine, Department of DermatologyMassachusetts General HospitalBostonUSA

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