Large-core tube-leaky waveguide for delivery of high-powered Er:YAG laser

S. Kobayashi, T. Katagiri, Y. Matsuura

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

Abstract

A tube-leaky fiber that consists of only dielectric thin-film tubing for delivery of Er:YAG laser light is presented. The tube-leaky fiber confines light in the airy core when the film thickness is properly chosen for target wavelength. Transmission properties of the fibers are derived by using a ray optic method and designed the optimum wall thickness for the Er:YAG laser wavelength of 2.94 micron. In fabrication of the tube leaky fiber, we use a microstructural tube made of glass to enhance mechanical strength. The central bore and surrounding glass thin layer that is held by the microstructure function as a tube-leaky fiber. We fabricate a large-core fiber for delivery of high-power medical lasers by stack-and-draw method and we use borosilicate-glass as a fiber material for low cost fabrication. Fabricated fibers have a diameter over 400 μm and from the loss measurements for Er:YAG laser, and the fibers deliver laser light with a transmission loss of 0.85 dB/m that is comparable to 0.7 dB/m of conventional hollow-optical fibers. The fibers withstand transmission of laser pulses with energy higher than 120 mJ. We confirm that these energies are enough to ablate biological tissues in surgical operations.

Original languageEnglish
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV
PublisherSPIE
ISBN (Print)9780819498519
DOIs
Publication statusPublished - 2014
EventOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV - San Francisco, CA, United States
Duration: 2014 Feb 12014 Feb 2

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8938
ISSN (Print)1605-7422

Other

OtherOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV
CountryUnited States
CitySan Francisco, CA
Period14/2/114/2/2

Keywords

  • Infrared fibers
  • Medical lasers
  • Photonic-crystal fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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