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Proceedings Paper

Characterization of tissue processing with a continuous-wave Tm:YAG laser at 2.06-um wavelength
Author(s): Holger Lubatschowski; Michael Fiebig; P. Fuhrberg; Heinrich O. Teichmann; Herbert Welling
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Paper Abstract

Laser radiation in the mid infrared region is a promising tool for soft tissue processing due to its strong absorption in water. In this study, a cw Tm:YAG laser emitting at 2.06 micrometer was used for basic investigations. The laser has a maximum output power of more than 30 W. Fresh pig skin, liver and heart tissue were irradiated at different intensities (up to 65 kW/cm2) and irradiation times (400 ms to 20 s). As a delivery system a 400 micrometer quartz fiber was used in contact as well as in non-contact mode. The irradiated samples were examined by light and electron microscopy. The ablation efficiency on soft tissue was determined to about 0.3 mg/J. The thermal induced damage covered a region of 100 to 500 micrometers lateral and 500 to 1000 micrometers axial to the crater. With regard to its compact dimensions and high efficiency the cw Tm:YAG laser appears to be a promising alternative to the CO2 laser especially when fiber transmission of the radiation is required.

Paper Details

Date Published: 13 May 1998
PDF: 5 pages
Proc. SPIE 3254, Laser-Tissue Interaction IX, (13 May 1998); doi: 10.1117/12.308171
Show Author Affiliations
Holger Lubatschowski, Laser Zentrum Hannover e.V. (Germany)
Michael Fiebig, LISA Laser Products OHG (Germany)
P. Fuhrberg, LISA Laser Products OHG (Germany)
Heinrich O. Teichmann, LISA Laser Products OHG (Germany)
Herbert Welling, Laser Zentrum Hannover e.V. (Germany)

Published in SPIE Proceedings Vol. 3254:
Laser-Tissue Interaction IX
Steven L. Jacques; Jeff Lotz, Editor(s)

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