A compact LPFG refractive index sensor with high sensitivity based on thin core -no core-thin core fiber structure

A novel refractive index (RI) sensor based on the thin core -no core-thin core (TNT) fiber structure is proposed. We investigated the RI and temperature sensitivity of this sensor, which has a higher RI sensitivity due to the stronger evanescent field generated by RI modulation. The software simulat...

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Bibliographic Details
Published in:Optics communications 2023-03, Vol.530, p.129138, Article 129138
Main Authors: Yu, Xuelian, Zuo, Shanshan, Zhang, Yue, Sun, Jing, Yang, Wenlei, Tian, Ke, Wang, Pengfei, Geng, Tao
Format: Article
Language:English
Subjects:
Long-period fiber grating
No core fiber
Refractive index
Temperature
Thin core fiber
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Summary:A novel refractive index (RI) sensor based on the thin core -no core-thin core (TNT) fiber structure is proposed. We investigated the RI and temperature sensitivity of this sensor, which has a higher RI sensitivity due to the stronger evanescent field generated by RI modulation. The software simulation and experiment validation show that the maximal RI and the temperature sensitivity of the TNT fiber structure are 880 nm/RIU and −0.066 nm/°C.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2022.129138