Open AccessMulti-element hollow-core anti-resonant fiber for infrared thermal imaging
Author(s) -
Takuya Kobayashi,
Takashi Kubo,
Yuji Matsuura
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.026565
Subject(s) - materials science , optics , bundle , fiber bundle , optical fiber , core (optical fiber) , hard clad silica optical fiber , infrared , photonic crystal fiber , lens (geology) , wavelength , crosstalk , fiber , thermal , optoelectronics , fiber optic sensor , polarization maintaining optical fiber , composite material , physics , meteorology
A bundle composed of 245 anti-resonant glass hollow optical fibers with a total diameter of 1 mm and fiber core diameter of 60 μm is fabricated for endoscopic infrared-thermal imaging. The bundle fiber shows low losses in the wavelength range of 3 to 4 μm owing to the anti-resonant effect of the thin glass wall. An image resolution of around 420 μm with a field-of-view of 3-mm diameter is obtained although crosstalk between adjacent fibers is observed. The experimental results of an imaging system using the fiber bundle with a half-ball lens at the distal end, which can be inserted into a working channel of endoscopes, are also shown.