Flexible hollow polycarbonate fiber for endoscopic infrared laser treatment

Masayuki Nakazawa, Yi Wei Shi, Katsumasa Iwai, Yuji Matsuura, Xiao Song Zhu, Mitsunobu Miyagi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


For endoscopic application, inexpensive, safe, and extremely flexible hollow infrared optical fibers have been fabricated based on the polycarbonate (PC) capillary with silver and cyclic olefin polymer (COP) as inner coatings. By optimizing the drawing condition of PC capillary from a commercially available polycarbonate tube and inner-coating process, transmission efficiency of hollow PC fibers is shown to be equal to those of glass capillary based ones. Both Er:YAG laser light and green pilot beam were delivered through the endoscope with low losses even when it was sharply bent with a bending radius as small as 1 centimeter. Preliminary experiments were also conducted on possibility of transmitting infrared thermal image by using bundled silver-coated PC hollow fibers.

Original languageEnglish
Title of host publicationEuropean Conference on Biomedical Optics, ECBO 2007
PublisherOptical Society of America
ISBN (Print)9780819467713
Publication statusPublished - 2007
EventEuropean Conference on Biomedical Optics, ECBO 2007 - Munich, Germany
Duration: 2007 Jun 172007 Jun 17

Publication series

NameOptics InfoBase Conference Papers
ISSN (Electronic)2162-2701


OtherEuropean Conference on Biomedical Optics, ECBO 2007

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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