基于光纤U形腔的马赫-曾德尔干涉仪的磁场传感器

范鹏程; 蒋学寨; 田德强; 张光强

doi:10.37188/CO.EN-2023-0015

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Chinese Optics > 2024 >

FAN Peng-cheng, JIANG Xue-zhai, Tian De-qiang, Zhang Guang-qiang. Magnetic field sensor utilizing U-Shaped Cavity based on in-fiber Mach–Zehnder interferometer[J]. Chinese Optics. doi: 10.37188/CO.EN-2023-0015

Citation:

FAN Peng-cheng, JIANG Xue-zhai, Tian De-qiang, Zhang Guang-qiang. Magnetic field sensor utilizing U-Shaped Cavity based on in-fiber Mach–Zehnder interferometer[J]. Chinese Optics. doi: 10.37188/CO.EN-2023-0015

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Magnetic field sensor utilizing U-Shaped Cavity based on in-fiber Mach–Zehnder interferometer

doi: 10.37188/CO.EN-2023-0015

CRRC ZHUZHOU INSTITUTE CO., LTD. Zhuzhou 421000, China

Funds: This work is supported by the CRRC ZHUZHOU INSTITUTE CO.,LTD.

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Author Bio:
FAN Peng-cheng (1992—), male, born in Hengyang, Hunan, Master's degree, obtained bachelor's degree and master's degree in Hunan University of Science and Engineering and Jinan University in 2014 and 2017, respectively.The main research directions are fiber optic sensing technology, LCD display, OLED display, and human-computer interaction technology. E-mail: fpc19920528@126.com or fanpc@crszic.com
Corresponding author: fpc19920528@126.com
Received Date: 06 Jul 2023
Accepted Date: 07 Oct 2023

Available Online: 13 Dec 2023

Abstract

Abstract

An optical fiber magnetic field sensor is proposed and experimentally demonstrated by using a U-shaped cavity based on in-fiber Mach-Zehnder interferometer (MZI) coated with magnetic fluid (MF). The magnetic field sensor is manufactured by splicing a section of single-mode fiber (SMF) between two sections of SMF with designed fiber geometric relationships. As the geometric symmetry MZI is strongly sensitive to the surrounding refractive index (RI) with a high sensitivity up to −13588 nm/RIU and MF’s RI is sensitive to magnetic field, the magnetic field sensing function of the proposed structure is realized. The results show that the magnetic field sensitivity reaches as high as 137 pm/Oe (1 mT=10 Gs=10 Oe), and the magnetic field range is almost linear from 0 to 250 Oe. The proposed magnetic field sensor has the advantages of small size, low cost, easy to manufacture, robustness, high sensitivity, good repeatability and easy to integrate with fiber optic systems.
- magnetic field sensor,
- magnetic fluid,
- U-shaped cavity,
- optical sensor

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References(29)

References

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