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Proceedings Paper

A novel magnetic fluid based magnetic field F-P current sensor
Author(s): Ji Xia; Qi Wang; Shuyu Jiang; Hong Luo
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Paper Abstract

A novel current measuring method based on the magnetic controllable refractive index characteristic of magnetic fluid and fiber optic Fabry-Perot (F-P) interferometer is proposed and demonstrated. A current sensing probe composed of fiber optic F-P interferometer filled with magnetic fluid (MF) is analyzed theoretically and numerically. Based on the theoretical analysis and numerical simulation results, the structure of the fiber optic F-P current sensor is designed and fabricated experimentally. The relationship of the magnetic fluid at various magnetic field is measured experimentally and the numerical model of relationship between the refractive index of magnetic fluid and the characteristics of F-P current sensor is built up. The sensor has the advantages of simple structure, low cost, and high magnetic field measurement sensitivity. A high magnetic field measurement sensitivity of 0.034 nm/Gs is achieved with the magnetic field varied from 0 to 391.5Gs, and the experiment results are consistent with the theoretical analysis and numerical simulation.

Paper Details

Date Published: 10 August 2015
PDF: 11 pages
Proc. SPIE 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 96200H (10 August 2015); doi: 10.1117/12.2193502
Show Author Affiliations
Ji Xia, National Univ. of Defense Technology (China)
Qi Wang, Northestern Univ. (China)
Shuyu Jiang, National Univ. of Defense Technology (China)
Hong Luo, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9620:
2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Xuping Zhang; David Erickson; Xudong Fan; Zhongping Chen, Editor(s)

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