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

Yoshihiro Hagiwara; Akihito Hongo; Minoru Obara

doi:10.1117/12.589972

21 March 2005 Ablation processing of biomedical materials with femtosecond double-pulse lasers through hollow fibers

Yoshihiro Hagiwara, Akihito Hongo, Minoru Obara

Proceedings Volume 5714, Commercial and Biomedical Applications of Ultrafast Lasers V; (2005) https://doi.org/10.1117/12.589972
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

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.

Citation Download Citation

Yoshihiro Hagiwara, Akihito Hongo, and Minoru Obara "Ablation processing of biomedical materials with femtosecond double-pulse lasers through hollow fibers", Proc. SPIE 5714, Commercial and Biomedical Applications of Ultrafast Lasers V, (21 March 2005); https://doi.org/10.1117/12.589972

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