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Proceedings Paper

Infrared hollow optical fibers and their applications in medicine
Author(s): Yi-Wei Shi; Yuji Matsuura; Katsumasa Iwai; Masashi Endo; Takashi Katagiri; Mitsunobu Miyagi
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Paper Abstract

Techniques for coating hollow glass fibers with layers of silver and cyclic olefin polymer have been developed for low-loss delivery of infrared laser light as well as a visible pilot beam. They have yielded losses of only 0.2 dB/m for Er:YAG and CO2 laser light and only 0.7 dB/m for red LD laser light. Debris is kept from entering the hollow output end of a fiber by hermitically sealing it with a quartz cap, and various focusing effects in both air and water have been obtained by controlling distal-end geometry of the caps during fabrication. Controlled focus patterns of Er:YAG laser light with an output energy of more than 400 mJ and a 10-Hz repetition rate have been delivered in saline through the fibers with sealing caps. Calculi were fragmented in vitro by using a hollow fiber with a sealing cap. It has been shown that Er:YAG laser combined with an effective delivery system could be used for minimally invasive calculi fragmentation.

Paper Details

Date Published: 21 June 2004
PDF: 9 pages
Proc. SPIE 5449, Eighth International Conference on Laser and Laser Information Technologies, (21 June 2004); doi: 10.1117/12.563189
Show Author Affiliations
Yi-Wei Shi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)
Katsumasa Iwai, Tohoku Univ. (Japan)
Masashi Endo, Tohoku Univ. (Japan)
Takashi Katagiri, Tohoku Univ. (Japan)
Mitsunobu Miyagi, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 5449:
Eighth International Conference on Laser and Laser Information Technologies
Vladislav Ya. Panchenko; Nikola V. Sabotinov, Editor(s)

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