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

Authors

Fangfang Wei, Technological University DublinFollow
Dejun Liu, Shenzhen University
Arun Kumar Mallik, Technological University Dublin
Gerald Farrell, Technological University DublinFollow
Qiang Wu, Northumbria University, United KingdomFollow
Gang-ding Peng, University of New South Wales, Australia
Yuliya Semenova, Technological University DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

Optics

Publication Details

This paper is published in the journal of Sensors, 2019, 19(23), 5100; 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.

DOI

https://doi.org/10.3390/s19235100

Recommended Citation

Wei, F., Liu, D., Mallik, A.K., Farrel, G., Wu, Q., Peng, G.-D., Semenova, Y. (2019). Magnetic field sensor based on a tri-microfiber coupler ring in magnetic fluid and a Fiber Bragg grating. Sensors 19, 5100. doi:10.3390/s19235100

Funder

FIOSRAIGH 2016 Dean of Graduate Students Award, TU Dublin, Ireland.