Characterization of tissue processing with a continuous-wave Tm:YAG laser at 2.06-um wavelength

Holger Lubatschowski; Michael Fiebig; P. Fuhrberg; Heinrich O. Teichmann; Herbert Welling

doi:10.1117/12.308171

13 May 1998 Characterization of tissue processing with a continuous-wave Tm:YAG laser at 2.06-μm wavelength

Holger Lubatschowski, Michael Fiebig, P. Fuhrberg, Heinrich O. Teichmann, Herbert Welling

Proceedings Volume 3254, Laser-Tissue Interaction IX; (1998) https://doi.org/10.1117/12.308171
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

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.

Citation Download Citation

Holger Lubatschowski, Michael Fiebig, P. Fuhrberg, Heinrich O. Teichmann, and Herbert Welling "Characterization of tissue processing with a continuous-wave Tm:YAG laser at 2.06-μm wavelength", Proc. SPIE 3254, Laser-Tissue Interaction IX, (13 May 1998); https://doi.org/10.1117/12.308171

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