Photonic Sensors, 2016, 6 (4): 312, Published Online: Oct. 21, 2016  

Liquid Level Sensor Based on CMFTIR Effect in Polymer Optical Fiber

Author Affiliations
Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan, 030051, China
Abstract
The macro-bending induced optical fiber cladding modes frustrated total internal reflection effect is used to realize the liquid level probe with a simple structure of single macro-bend polymer optical fiber loop. The test results show that the extinction ratio reaches 1.06 dB. “First bath” phenomenon is not obvious (about 0.8%). The robustness of the sensor is better, and the ability of anti-pollution is stronger compared with the conventional sensors. The process of making this sensing probe is extremely easy, and the cost is very low.
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Yulong HOU, Wenyi LIU, Huixin ZHANG, Shan SU, Jia LIU, Yanjun ZHANG, Jun LIU, Jijun XIONG. Liquid Level Sensor Based on CMFTIR Effect in Polymer Optical Fiber[J]. Photonic Sensors, 2016, 6(4): 312.

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