An ultra-low loss balloon-type single stress-applying optical fiber refractive index sensor

被引：2
作者：
Ma, Yuxi [1 ]
Liu, Ruijie [1 ]
Han, Bing [1 ,2 ]
Cheng, Qian [1 ]
Tao, Yiming [1 ]
Wang, Luyao [1 ,2 ]
Lv, Riqing [1 ,2 ]
Zhao, Yong [1 ,2 ]
机构：
[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China
[2] Hebei Key Lab Micronano Precis Opt Sensing & Measu, Qinhuangdao 066004, Peoples R China
来源：
MEASUREMENT | 2025年 / 242卷
基金：
中国国家自然科学基金;
关键词：
Optical fiber sensor; Refractive index sensor; Balloon-type sensor; Ultra-low loss; BIOSENSORS; CELLS; FOOD;
D O I：
10.1016/j.measurement.2024.116186
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the field of refractive index (RI) sensing, macro-bending sensors have been widely studied for their advantages of low loss and easy fabrication. Here, an ultra-low loss balloon-type single stress-applying fiber (SSAF) sensor is demonstrated. The sensor is manufactured by splicing SSAF between two single-mode fibers (SMFs) in a balloon shape. The sensing of different RI solutions is realized based on the strong evanescent field characteristics generated by the SSAF with a stress-sensitive zone during bending. Compared with other macro-bending sensors, the RI sensitivity of the proposed sensor with a bend diameter of 0.95 cm has been doubled, reaching up to 387.09 nm/RIU in the range of 1.3308-1.3628, with a resolution of 0.0013 and a loss of 2.22 dB. The sensor has a compact structure, low processing difficulty, strong reproducibility, and low loss, which provides a new way for the development prospects of biomedical science, environmental monitoring, food safety, etc.
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页数：7
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