Magnetic Field Sensor Based on a Tri-Microfiber Coupler Ring in Magnetic Fluid and a Fiber Bragg Grating

Wei, Fangfang, Liu, Dejun, Mallik, Arun Kumar, Farrel, Gerald, Wu, Qiang, Peng, Gang-Ding and Semenova, Yuliya (2019) Magnetic Field Sensor Based on a Tri-Microfiber Coupler Ring in Magnetic Fluid and a Fiber Bragg Grating. Sensors, 19 (23). p. 5100. ISSN 1424-8220

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Official URL: https://doi.org/10.3390/s19235100

Abstract

In this paper we propose and investigate a novel magnetic field sensor based on a Tri-microfiber coupler combined with magnetic fluid and a fiber Bragg grating (FBG) in a ring. A sensitivity of 1306 pm/mT was experimentally demonstrated in the range of magnetic fields from 0 to 15 mT. The reflection peak in the output spectrum associated with the FBG serves as a reference point allowing to avoid ambiguity in determining the spectral shift induced by the magnetic field. Due to its high sensitivity at low magnetic fields, the proposed structure could be of high interest in low field biosensing applications that involve a magnetic field, such as magnetic manipulation or separation of biomolecules.

Item Type: Article
Uncontrolled Keywords: magnetic field sensor; magnetic fluid; tri-microfiber coupler; taper; fiber Bragg grating (FBG)
Subjects: F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 21 Nov 2019 14:17
Last Modified: 21 Nov 2019 14:30
URI: http://nrl.northumbria.ac.uk/id/eprint/41566

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