Document Type

Article

Rights

This item is available under a Creative Commons License for non-commercial use only

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

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