Excessively tilted fiber grating-based vector magnetometer

Tean Lu, Yuezhen Sun, Yarien Moreno, Qizhen Sun, Kaiming Zhou, Hushan Wang, Zhijun Yan*, Deming Liu, Lin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A compact optic-fiber vector magnetometer is proposed and experimentally demonstrated, which is based on an excessively tilted fiber grating (Ex-TFG) assistant with the magnetic fluid (MF). Without any complicated processing, the cladding mode resonances of the bare Ex-TFG packaged by the MF show high sensitivity to slight perturbations by the magnetic field. Due to the excellent magneto-optical properties of the MF and the azimuth-dependent refractive index sensitivity of the Ex-TFG, such a magnetometer can achieve the magnetic field intensity sensitivity of 2.45 nm/mT and the orientation sensitivity of 0.41 nm/ deg. In addition, based on the spectral interrogation, the detection limit of the magnetic field intensity could reach around 8.1 μT at the minimum wavelength measurement accuracy of 0.02 nm.

Original languageEnglish
Pages (from-to)2494-2497
Number of pages4
JournalOptics Letters
Issue number10
Publication statusPublished - 10 May 2019

Bibliographical note

This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-44-10-2494. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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