Magnetic field sensor based on a combination of a microfiber coupler covered with magnetic fluid and a Sagnac loop

Wei, Fangfang, Mallik, Arun Kumar, Liu, Dejun, Wu, Qiang, Peng, Gang-Ding, Farrell, Gerald and Semenova, Yuliya (2017) Magnetic field sensor based on a combination of a microfiber coupler covered with magnetic fluid and a Sagnac loop. Scientific Reports, 7 (1). p. 4725. ISSN 2045-2322

[img]
Preview
Text (Full text)
Wei et al - Magnetic Field Sensor based on a combination of a microfiber coupler and a Sagnac loop.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (2MB) | Preview
Official URL: https://doi.org/10.1038/s41598-017-05199-y

Abstract

This paper proposes a novel magnetic field sensor based on a microfiber coupler (MFC) combined with a magnetic fluid (MF) in a Sagnac loop formed from a polarization maintaining fiber (PMF). Thanks to the small (~2.6 μm) waist diameter of the MFC, the resulting interference is strongly influenced by the presence of the MF and this leads to the desirable high sensitivity of the structure to the applied magnetic field. The maximum magnetic field sensitivities of −100 pm/mT and −488 pm/mT have been experimentally demonstrated with the PMF lengths of 75 cm and 20 cm respectively in the range of magnetic field strengths from 0 to 200 mT. The dependence of the magnetic field orientation on the performance of the proposed sensor was also examined. The proposed magnetic field sensor is advantageous for applications requiring higher sensitivity over a wide magnetic field range.

Item Type: Article
Uncontrolled Keywords: Environmental monitoring, Fibre optics and optical communications, Magnetic properties and materials, Microfluidics, Optical sensors
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Paul Burns
Date Deposited: 26 Jul 2017 15:05
Last Modified: 25 Oct 2017 17:01
URI: http://nrl.northumbria.ac.uk/id/eprint/31398

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence