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Sensors 2014, 14(10), 19086-19094; doi:10.3390/s141019086

Magnetic Field Sensing Based on Magnetic-Fluid-Clad Multimode-Singlemode-Multimode Fiber Structures

College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
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Received: 17 July 2014 / Revised: 22 September 2014 / Accepted: 8 October 2014 / Published: 14 October 2014
(This article belongs to the Section Physical Sensors)
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Abstract

Magnetic field sensing based on magnetic-fluid-clad multimode-singlemode- multimode fiber structures is proposed and experimentalized. The structures are fabricated out using fiber fusion splicing techniques. The sensing principle is based on the interference between the core mode and cladding modes. Two interference dips are observed in our spectral range. Experimental results indicate that the magnetic field sensing sensitivities of 215 pm/mT and 0.5742 dB/mT are obtained for interference dip around 1595 nm. For interference dip around 1565 nm, the sensitivities are 60.5 pm/mT and 0.4821 dB/mT. The response of temperature is also investigated. The temperature sensitivity for the dip around 1595 nm is obtained to be 9.93 pm/°C. View Full-Text
Keywords: magnetic fluid; multimode-singlemode-multimode fiber structure; mode interference magnetic fluid; multimode-singlemode-multimode fiber structure; mode interference
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tang, J.; Pu, S.; Dong, S.; Luo, L. Magnetic Field Sensing Based on Magnetic-Fluid-Clad Multimode-Singlemode-Multimode Fiber Structures. Sensors 2014, 14, 19086-19094.

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