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- Title
An Optical Fiber Liquid Level Sensor Based on Side Coupling Induction Technology.
- Authors
Zhang, Yanjun; Zhang, Yingzi; Hou, Yulong; Zhang, Liang; Hu, Yanjun; Gao, Xiaolong; Zhang, Huixin; Liu, Wenyi
- Abstract
An optical fiber liquid level sensor based on two twisted polymer optical fibers twining around a racetrack column is demonstrated in this study. The side-coupling power of the passive fiber is modulated by the refractive index (RI) of the environment medium and decreases while the liquid level increases. The variation patterns of the side-coupling power in the bent section and the straight section form a step attenuation, which can improve the measurement range with a superior sensitivity and distinguish liquids with different RIs. Furthermore, the cost-effective sensor also shows good reversibility and low temperature-dependent properties.
- Subjects
OPTICAL fibers; REFRACTIVE index; ATTENUATION (Physics); LIQUID level indicators; POLYMERS
- Publication
Journal of Sensors, 2018, p1
- ISSN
1687-725X
- Publication type
Article
- DOI
10.1155/2018/2953807