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Proceedings Paper

Hollow bent output devices in CO2 laser light delivery system
Author(s): Katsumasa Iwai; Yi-Wei Shi; Yuji Matsuura; Mitsunobu Miyagi; Junko Oishi; Yoshihide Okagami
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Paper Abstract

In order to change the output direction of laser light in a small operation space, two types of hollow bent output devices are proposed for medical laser light delivery system. One is the hollow fiber insert-type, which is of the bending radius of 40 mm. The other type, based on a fixed- bent pyrex glass tube, is of the minimum bending radius of 2 mm. Both types of devices are inner-coated with a silver layer and a cyclic olefin polymer (COP) layer. Loss properties for CO2 laser light are clarified for the insert-type devices, called laryngo-tip. And the transmission properties for pilot beams are experimentally discussed. For the fixed-bent tips, the losses are around 0.7 dB, which are almost independent on the bending angles and radii. Transmissions of the tips remain undamaged after 1-hour-delivery of 5 W output CO2 laser light.

Paper Details

Date Published: 26 March 2002
PDF: 9 pages
Proc. SPIE 4616, Optical Fibers and Sensors for Medical Applications II, (26 March 2002); doi: 10.1117/12.463808
Show Author Affiliations
Katsumasa Iwai, Tohoku Univ. (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)
Mitsunobu Miyagi, Tohoku Univ. (Japan)
Junko Oishi, J. Morita-M. F. G. Corp. (Japan)
Yoshihide Okagami, J. Morita-M. F. G. Corp. (Japan)

Published in SPIE Proceedings Vol. 4616:
Optical Fibers and Sensors for Medical Applications II
Israel Gannot, Editor(s)

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