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Proceedings Paper

Ablation processing of biomedical materials with femtosecond double-pulse lasers through hollow fibers
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Paper Abstract

We have demonstrated the ablation processing of dry-collagen with double pulsed femtosecond lasers through a bent hollow fiber. Using a 320 μm core-diameter hollow fiber, we have delivered an ultrashort pulse with a pulse width of 200 fs (straight condition), 320 fs (bent condition), and a near Gaussian beam profile. Furthermore, a precise biomedical material processing is obtainable with a transmitted femtosecond laser beam through a bent hollow fiber. The material processing speed is increased using femtosecond double pulses and by optimizing the delay time. The optimal delay time between the double pulses is from 1 ps to 3 ps, because the ablation rate decreased due to a plasma shielding effect beyond a 5 ps delay time. Our results will open up new medical endoscopic applications.

Paper Details

Date Published: 21 March 2005
PDF: 7 pages
Proc. SPIE 5714, Commercial and Biomedical Applications of Ultrafast Lasers V, (21 March 2005); doi: 10.1117/12.589972
Show Author Affiliations
Yoshihiro Hagiwara, Keio Univ. (Japan)
Akihito Hongo, Hitachi Cable, Ltd. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 5714:
Commercial and Biomedical Applications of Ultrafast Lasers V
Joseph Neev; Christopher B. Schaffer; Andreas Ostendorf; Stefan Nolte, Editor(s)

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