Dynamics in laser cutting of soft media

Martin Frenz; Adrian D. Zweig; Valerio Romano; Heinz P. Weber; N. I. Chapliev; Alexander S. Silenok

doi:10.1117/12.17608

1 June 1990 Dynamics in laser cutting of soft media

Martin Frenz, Adrian D. Zweig, Valerio Romano, Heinz P. Weber, N. I. Chapliev, Alexander S. Silenok

Proceedings Volume 1202, Laser-Tissue Interaction; (1990) https://doi.org/10.1117/12.17608
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

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.

Citation Download Citation

Martin Frenz, Adrian D. Zweig, Valerio Romano, Heinz P. Weber, N. I. Chapliev, and Alexander S. Silenok "Dynamics in laser cutting of soft media", Proc. SPIE 1202, Laser-Tissue Interaction, (1 June 1990); https://doi.org/10.1117/12.17608

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