中赤外光イメージングのための反共振型中空マルチコアファイバ
2020 年 48 巻 6 号 p. 291-
詳細
2020 年 48 巻 6 号 p. 291-
We fabricated a multi-core glass fiber composed of 245 anti-resonant hollow optical fibers with a total diameter of 1 mm and a core diameter of 60 μm for endoscopic infrared-thermal imaging. The multicore fiber shows low losses in a wavelength range of 3 to 4 μm owing to the anti-resonant effect of the thin glass wall. We obtained an image resolution of around 420 μm with a 3-mm-diameter field-of-view, although crosstalk between the adjacent fibers was observed. We also described the results of an imaging system that uses multi-core fiber with a half-ball lens at the distal end, which can be inserted into a working channel of endoscopes.
