@inproceedings{afe7cb939b744332a611f283010f8140,
title = "Transmission properties of 700-μm-bore hollow optical fibers based on flexible Ni-Ti tube",
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 700 μm, the Ni-Ti tube with a wall thickness of 75 μm can be bent easily to a bending radius as small as 15 mm. Therefore, 700-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 were demonstrated.",
keywords = "CO2 laser., coating, hollow fiber, Ni-Ti tube",
author = "Katsumasa Iwai and Hiroyuki Takaku and Mitsunobu Miyagi and Shi, {Yi Wei} and Zhu, {Xiao Song} and Yuji Matsuura",
note = "Funding Information: This research is supported by the Japan Society for the Promotion of Science of Japan through a Grant-in-Aid for Scientific Research (C) (19K04542) 2021, and Grant-in-Aid for Scientific Research (C) (19K12833) 2021. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXII 2022 ; Conference date: 20-02-2022 Through 24-02-2022",
year = "2022",
doi = "10.1117/12.2605723",
language = "English",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
editor = "Israel Gannot and Israel Gannot and Katy Roodenko",
booktitle = "Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXII",
}