Analysis of a Magnetic Field Sensor Based on a Sagnac Interferometer Using a Magnetic Fluid-Filled Birefringent Photonic Crystal Fiber

Mingjian Ma; Hailiang Chen; Shuguang Li; Xili Jing; Wenxun Zhang; Mingyue Wang

doi:10.1109/JPHOT.2019.2921552

IEEE Photonics Journal (Jan 2019)

Analysis of a Magnetic Field Sensor Based on a Sagnac Interferometer Using a Magnetic Fluid-Filled Birefringent Photonic Crystal Fiber

Mingjian Ma,
Hailiang Chen,
Shuguang Li,
Xili Jing,
Wenxun Zhang,
Mingyue Wang

Affiliations

Mingjian Ma: State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China
Hailiang Chen: ORCiD; State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China
Shuguang Li: State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China
Xili Jing: State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China
Wenxun Zhang: State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China
Mingyue Wang: State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, China

DOI: https://doi.org/10.1109/JPHOT.2019.2921552
Journal volume & issue: Vol. 11, no. 4
pp. 1 – 10

Abstract

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A magnetic field sensor based on a Sagnac interferometer using a magnetic fluid-filled birefringent photonic crystal fiber (MF-BPCF) was proposed and studied by finite element method. Two large air holes in the birefringent photonic crystal fiber were designed to fill with magnetic fluid. The MF-BPCF in the proposed Sagnac interferometer acted as the sensing head. As magnetic field perpendicular to the MF-BPCF, magnetic fluid was anisotropic. The characteristics of the output spectrum of the Sagnac interferometer was simulated. The results showed that when the phase difference φ satisfied integer multiples of 2π, several dip wavelengths appeared. Not only the intensity but also the direction of the magnetic field was measured. The measuring sensitivity could be further promoted by making the dip wavelength approach λBg=0.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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