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Proceedings Paper

Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous strain and temperature measurement base on phase demodulation
Author(s): Jing Wu; Yongfeng Wu; Tong Nan; Yan Liu; Song Liu
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Paper Abstract

A novel dual-parameter sensor created by fusion splicing single mode fiber (SMF) and hollow core silica tube (HCST) is experimentally demonstrated for simultaneous strain and temperature measurement based on hybrid structured fiberoptic Fabry-Perot interferometer (FPI) via phase demodulation. By the phase demodulation in the spatial frequency domain, strain sensitivities of -0.002rad/με and 0.0006rad/με are respectively obtained for air-cavity and the silica-cavity with the strain range from 0με to 1000με, and the temperature sensitivities of -0.0002rad/°C and -0.01rad/°C are respectively for air-cavity and silica-cavity with the temperature range from 50°C to 450°C. Therefore, the different sensing characteristics of silica-cavity and air-cavity to strain and temperature show that this structure can be further developed to concurrently sense strain and temperature.

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, 114360P (12 March 2020); doi: 10.1117/12.2549848
Show Author Affiliations
Jing Wu, Nanjing Univ. of Information Science & Technology (China)
Yongfeng Wu, Nanjing Univ. of Information Science & Technology (China)
Tong Nan, Nanjing Univ. of Information Science & Technology (China)
Yan Liu, Jiangxi Post and Telecommunications Planning and Design Institute Co., Ltd. (China)
Song Liu, China Telecom Co., Ltd. (China)


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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