Effect of temperature on frequency-shifted interferometry fiber loop ring-down magnetic field sensing system

Jiaxuan Chen; Chunfu Cheng; Yiwen Ou; Wenjia Chen; Hui Lv; Li Fang

doi:10.1117/12.2574607

5 November 2020 Effect of temperature on frequency-shifted interferometry fiber loop ring-down magnetic field sensing system

Jiaxuan Chen, Chunfu Cheng, Yiwen Ou, Wenjia Chen, Hui Lv, Li Fang

Author Affiliations +

Proceedings Volume 11567, AOPC 2020: Optical Sensing and Imaging Technology; 115670F (2020) https://doi.org/10.1117/12.2574607
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

A fiber loop ring-down (FLRD) magnetic field sensing system combined with frequency-shifted interferometry (FSI) was proposed and the effect of temperature on its performance was experimentally demonstrated. The FSI-FLRD technique measures the light intensity decay rate (called the ring-down distance) in the space domain instead of in the time domain. Compared with conventional time domain FLRD scheme, FSI-FLRD technique greatly reduces the cost due to only need of inexpensive continuous-wave laser and slow detection. The tapered single mode fiber surrounded by magnetic fluid (MF) was utilized to construct the sensor head for temperature measurement. Different temperature was generated due to the thermal effect of MF and the temperature was obtained by measuring the ring-down distance. The experimental results indicated that a sensitivity of 0.31 /(mm·°C) was achieved.

Citation Download Citation

Jiaxuan Chen, Chunfu Cheng, Yiwen Ou, Wenjia Chen, Hui Lv, and Li Fang "Effect of temperature on frequency-shifted interferometry fiber loop ring-down magnetic field sensing system", Proc. SPIE 11567, AOPC 2020: Optical Sensing and Imaging Technology, 115670F (5 November 2020); https://doi.org/10.1117/12.2574607

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KEYWORDS

Magnetic sensors

Magnetism

Sensing systems

Sensors

Interferometry

Thermal effects

Temperature metrology

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