A sensitized fiber optic Fabry-Perot temperature sensor based on virtual Vernier effect

Cheng Zhang; Jing Yang; Guanghuan Cui; Zheng Sun; Yafeng Zhao; Jixuan Wu; Shanshan Zhang; Junfa Zhao; Hua Bai; Changyun Miao

doi:10.1117/12.2605885

1 November 2021 A sensitized fiber optic Fabry-Perot temperature sensor based on virtual Vernier effect

Cheng Zhang, Jing Yang, Guanghuan Cui, Zheng Sun, Yafeng Zhao, Jixuan Wu, Shanshan Zhang, Junfa Zhao, Hua Bai, Changyun Miao

Author Affiliations +

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120572G (2021) https://doi.org/10.1117/12.2605885
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

An optical fiber Febry-Perot (FP) temperature sensor based on virtual vernier effect is proposed. The parallel vernier effect is realized by superposing virtual reference interferometer to improve the sensitivity of temperature detection. This method can effectively avoid the measurement error caused by the external interference of the physical reference interferometer. The FP temperature sensor was made by sealed with thermosensitive polymer into a capillary. By measuring the wavelength shift of the interference valley, the temperature sensitivity of the sensor is 2.205 nm/°C. The generative approach of the virtual interference spectrum is proposed and the theoretical simulation is carried out. The physical and virtual reference interferometers were respectively used to carry out the comparative experiments of the vernier sensitization. The temperature sensitivities obtained by the physical and the virtual reference interferometers were 10.053 nm/°C and 9.911 nm/°C in the temperature range of 51-55°C, respectively. The sensitivity magnifications were 4.559 and 4.495 times respectively, which proved the feasibility of the FP sensor demodulation by using virtual vernier effect. This method can obtain an optical fiber temperature sensing system with high-sensitivity, low complexity and low cost.

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Cheng Zhang, Jing Yang, Guanghuan Cui, Zheng Sun, Yafeng Zhao, Jixuan Wu, Shanshan Zhang, Junfa Zhao, Hua Bai, and Changyun Miao "A sensitized fiber optic Fabry-Perot temperature sensor based on virtual Vernier effect", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120572G (1 November 2021); https://doi.org/10.1117/12.2605885

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KEYWORDS

Interferometers

Sensors

Temperature metrology

Capillaries

Temperature sensors

Fiber optics sensors

Single mode fibers

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