Fabrication of 50-µm-bore hollow fiber for infrared transmission

Katsumasa Iwai; Kouki Takahashi; Hiroyuki Takaku; Mitsunobu Miyagi; Yi-Wei Shi; Yuji Matsuura

doi:10.1117/12.2036666

20 February 2014 Fabrication of 50-μm-bore hollow fiber for infrared transmission

Katsumasa Iwai, Kouki Takahashi, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV; 893808 (2014) https://doi.org/10.1117/12.2036666
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Extremely flexible hollow fibers with 50 μm-bore size were developed for infrared laser light delivery. The hollow fiber was inner coated with silver and a dielectric layer to enhance the reflection rate at an objective wavelength band. The silver layer was inner-plated by using the conventional silver mirror-plating technique. Concerning the fabrication parameters used up to now for 320-μm bore-sized fibers, the target flowing rate for plating solutions was 10 ml/min. Parallelly arranged bundles of silica capillary were used to increase the cross-sectional area. To achieve the target, bundles with 4800 pieces were used for the capillary with a length of 20 cm and inner diameters of 50 μm. The loss for the 50 μm bore size, 10 cm length silver hollow fiber was 6 dB at the wavelength of 1 μm. Thin dielectric layer was formed by using liquid-phase coating method for low-loss transmission of Nd:YAG and Er:YAG laser light.

Citation Download Citation

Katsumasa Iwai, Kouki Takahashi, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, and Yuji Matsuura "Fabrication of 50-μm-bore hollow fiber for infrared transmission", Proc. SPIE 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 893808 (20 February 2014); https://doi.org/10.1117/12.2036666

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