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Proceedings Paper

Comparison of tissue ablation by ultrashort laser pulses in the nano-, pico-, and femtosecond range
Author(s): Frieder H. Loesel; Peter Brockhaus; Joerg P. Fischer; Marcus H. Goetz; Frank Noack; Josef F. Bille
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Paper Abstract

Plasma mediated ablations of calf brain tissue and corneal tissue have been performed with ultrashort pulses provided by different laser systems: A 30 ps Nd:YLF amplified laser with up to 1.5 mJ of pulse energy and a powerful 180 fs Ti:Sapphire oscillator/regenerative amplifier laser system capable of pulse energies of up to 300 (mu) J. With the femtosecond pulses the threshold in energy density needed for initiating the ablation process was found to be significantly lower than with longer pulse durations. Furthermore, the amount of ablated material is by a factor of two greater with the femtosecond pulses compared to the results obtained with the picosecond pulses. Histological examinations did not show any thermal or structural damage in adjacent tissue with pulses in the pico- and femtosecond range as it could be found after irradiation with longer pulses. The morphology of the excisions is of a very high quality.

Paper Details

Date Published: 18 January 1995
PDF: 7 pages
Proc. SPIE 2323, Laser Interaction with Hard and Soft Tissue II, (18 January 1995); doi: 10.1117/12.199201
Show Author Affiliations
Frieder H. Loesel, Univ. of Heidelberg (Germany)
Peter Brockhaus, Univ. of Heidelberg (Germany)
Joerg P. Fischer, Univ. of Heidelberg (Germany)
Marcus H. Goetz, Univ. of Heidelberg (Germany)
Frank Noack, Max-Born-Institute for Nonlinear Optics and Spectroscopy (Germany)
Josef F. Bille, Univ. of Heidelberg (Germany)


Published in SPIE Proceedings Vol. 2323:
Laser Interaction with Hard and Soft Tissue II
Hans Joerg Albrecht; Guy P. Delacretaz; Thomas H. Meier; Rudolf W. Steiner; Lars Othar Svaasand; Martin J. C. van Gemert, Editor(s)

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