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Proceedings Paper

Dynamics in laser cutting of soft media
Author(s): Martin Frenz; Adrian D. Zweig; Valerio Romano; Heinz P. Weber; N. I. Chapliev; Alexander S. Silenok
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Paper Abstract

A high speed camera was used to record time-resolved the development and the shape of the holes drilled by Er:YAG laser pulses of high intensity. The experimental results suggest that above a critical radiant exposure the dynamics of the drilling mechanism changes and driven by a high vapor pressure gradient, hydrodynamic instabilities within the hole occur. They are evidenced by dramatic local variations of the channel diameter and by a decrease of the normalized recoil momentum. These instabilities influence strongly the extent, and velocity of the ejection. It is shown that, when cutting soft tissue, the extent of the zone of thermal damage is determined by the amount of hot liquefied material that remains in the hole and acts as a heat source.

Paper Details

Date Published: 1 June 1990
PDF: 12 pages
Proc. SPIE 1202, Laser-Tissue Interaction, (1 June 1990); doi: 10.1117/12.17608
Show Author Affiliations
Martin Frenz, Univ. of Bern (Switzerland)
Adrian D. Zweig, Univ. of Bern (Switzerland)
Valerio Romano, Univ. of Bern (Switzerland)
Heinz P. Weber, Univ. of Bern (Switzerland)
N. I. Chapliev, General Physics Institute (Russia)
Alexander S. Silenok, General Physics Institute (Russia)

Published in SPIE Proceedings Vol. 1202:
Laser-Tissue Interaction
Steven L. Jacques, Editor(s)

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