Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous strain and temperature measurement base on phase demodulation

Jing Wu; Yongfeng Wu; Tong Nan; Yan Liu; Song Liu

doi:10.1117/12.2549848

12 March 2020 Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous strain and temperature measurement base on phase demodulation

Jing Wu, Yongfeng Wu, Tong Nan, Yan Liu, Song Liu

Author Affiliations +

Proceedings Volume 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 114360P (2020) https://doi.org/10.1117/12.2549848
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

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.

Citation Download Citation

Jing Wu, Yongfeng Wu, Tong Nan, Yan Liu, and Song Liu "Hybrid structured fiber-optic Fabry-Perot interferometer for simultaneous strain and temperature measurement base on phase demodulation", Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 114360P (12 March 2020); https://doi.org/10.1117/12.2549848

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