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All-fiber-optic vector magnetometer based on anisotropic magnetism-manipulation of ferromagnetism nanoparticles

Authors :
Min Zhang
Junfeng Jiang
Jinde Yin
Shuangchen Ruan
Li Yu
Peiguang Yan
Hao Chen
Source :
Applied Physics Letters. 110:231104
Publication Year :
2017
Publisher :
AIP Publishing, 2017.

Abstract

The development of simple and sensitive sensors with the capability of simultaneously detecting magnetic field intensity and its direction in three-dimensional (3D) space is a technical imperative for magnetic field detection. In this paper, we first demonstrated the mechanism of anisotropic manipulation of ferromagnetism nanoparticles (FMNPs) in a non-continuous magnetic fluid film with the aid of varying magnetic fields. Second, based on the anisotropic distribution of the FMNPs around an optical fiber, we fabricated a vector magnetometer with a direction error of ±1.9° and an intensity sensitivity of 222.0 pm/mT, respectively. The sensing mechanism relies on the magnetism-controllable effective refractive index modification of asymmetric cladding modes in an in-line fiber-optic Mach-Zehnder interferometer. Compared to the previously reported intensity-based magnetometers, the as-fabricated magnetometer also provides an avenue to monitor the vector direction of the magnetic field in 3D space.

Details

ISSN :
10773118 and 00036951
Volume :
110
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........65bbd317209f28a6073d2caec151e7a1
Full Text :
https://doi.org/10.1063/1.4984137