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Proceedings Paper

Interferometric fiber optic surface plasmon resonance sensor for temperature and strain measurement
Author(s): Yi Duo; Zhenwei Huo; Yuzhi Chen; Youfu Ghen; Xuejin Li; Xueming Hong
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Paper Abstract

This study proposes a novel interferometric fiber optic SPR sensor which is able to realize both the temperature and the strain sensing with high sensitivity. Firstly, it is fabricated by splicing a no core fiber between two single-mode fibers to form the multimode interference structure. Then, half-length of the no core fiber is deposited by the gold film layer to form the classic three-layer SPR sensor. Finally, PDMS is covered onto the whole surface of the no core fiber, which performs as a medium to convert the external temperature changes into its refractive index variations. When compared with the other fiber optic sensors, the proposed sensor realizes the temperature and strain measurements based on two independent sensing mechanisms, particularly speaking, the temperature sensing is realized based on the SPR mechanism, and the strain sensing is realized based on the multimode interference. Hence, its inherent cross-sensitivity can be largely suppressed since the two sensing mechanisms are independent of each other. Besides, the proposed sensor shows both high-temperature sensitivity (1.13 nm/℃) and strain sensitivity (54.1 pm/με), which is suitable for the dual-parameter measurements.

Paper Details

Date Published: 12 March 2020
PDF: 6 pages
Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 114360B (12 March 2020); doi: 10.1117/12.2543444
Show Author Affiliations
Yi Duo, Shenzhen Univ. (China)
Zhenwei Huo, Shenzhen Univ. (China)
Yuzhi Chen, Shenzhen Univ. (China)
Youfu Ghen, Shenzhen Univ. (China)
Shenzhen Key Lab. of Sensor Technology (China)
Shenzhen Engineering Lab. for Optical Fiber Sensors and Networks (China)
Xuejin Li, Shenzhen Key Lab. of Sensor Technology (China)
Shenzhen Engineering Lab. for Optical Fiber Sensors and Networks (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Xueming Hong, Shenzhen Univ. (China)
Shenzhen Engineering Lab. for Optical Fiber Sensors and Networks


Published in SPIE Proceedings Vol. 11436:
2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Xuping Zhang; Hai Xiao, Editor(s)

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