Fabrication of 800-μm-bore hollow optical fibers based on completely non-fragile and flexible Ni-Ti tube for the infrared

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi Wei Shi, Xiao Song Zhu, Yuji Matsuura

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

Abstract

Ni-Ti tube is used as a supporting tube for the infrared hollow fiber to obtain flexibility and strong mechanical strength. The loss of Hollow optical fiber is inversely proportional to the cube of the inner diameter. Considering this, it is expected that the large-diameter hollow optical fiber has a low loss. Even with a large inner diameter of 800 μm, the Ni-Ti tube with a wall thickness of 0.1 mm can be bent with a small force to a bending radius of 15 mm. Therefore, 800-μm-bore hollow optical fiber based on Ni-Ti tube was fabricated. In order to reduce roughness of inner surface of Ni-Ti tube which causes the additional transmission loss, an acrylic-silicon resin material is used as a buffer layer to the inner wall of Ni-Ti tube for a low-loss characteristic. For the dielectric inner-coating layer, cyclic olefin polymer (COP) is used to lower the transmission loss. The COP layer is formed by using liquid-phase coating method. The hollow fibers with optimized COP inner film thickness for CO2 laser light were fabricated and reasonable transmission losses was demonstrated.

Original languageEnglish
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI
EditorsIsrael Gannot, Katy Roodenko
PublisherSPIE
ISBN (Electronic)9781510641051
DOIs
Publication statusPublished - 2021
EventOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI 2021 - Virtual, Online, United States
Duration: 2021 Mar 62021 Mar 11

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume11635
ISSN (Print)1605-7422

Conference

ConferenceOptical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXI 2021
Country/TerritoryUnited States
CityVirtual, Online
Period21/3/621/3/11

Keywords

  • COlaser
  • Hollow fiber
  • Ni-Ti tube
  • coating

ASJC Scopus subject areas

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

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