A novel method for distributed magnetic field measurement based on polarization-sensitive OFDR

Yi Tang; Mengshi Zhu; Yunzhe Gu; Liang Zhang; Heming Wei; Fufei Pang

doi:10.1117/12.2691542

27 September 2023 A novel method for distributed magnetic field measurement based on polarization-sensitive OFDR

Yi Tang, Mengshi Zhu, Yunzhe Gu, Liang Zhang, Heming Wei, Fufei Pang

Proceedings Volume 12813, Asia-Pacific Optical Sensors Conference (APOS 2023); 1281304 (2023) https://doi.org/10.1117/12.2691542
Event: Asia Pacific Optical Sensors Conference 2023, 2023, Tianjin, China

Abstract

A distributed optical fiber magnetic field sensor based on polarization-sensitive optical frequency domain reflectometer (POFDR) is proposed. The sensor employs a novel distributed magnetic field measurement method that firstly extracts the magnetic field induced nonreciprocal circular birefringence by the combination of the Stokes vectors and the backward Mueller matrices from the measured state of polarization (SOP). Then, the accumulated Faraday rotation angles can be further calculated to characterize the distribution of the magnetic field. It overcomes the drawback of the conventional POFDR scheme that requires at least two different input SOPs for each sensing. Finally, the aforementioned effectiveness has been experimentally verified by using a single-mode fiber as the sensing fiber. The distribution of a static magnetic field in milliTesla has been successfully measured at a spatial resolution of 0.16 m.

Citation Download Citation

Yi Tang, Mengshi Zhu, Yunzhe Gu, Liang Zhang, Heming Wei, and Fufei Pang "A novel method for distributed magnetic field measurement based on polarization-sensitive OFDR", Proc. SPIE 12813, Asia-Pacific Optical Sensors Conference (APOS 2023), 1281304 (27 September 2023); https://doi.org/10.1117/12.2691542

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