
Proceedings Paper
High spatial resolution distributed optical fiber magnetic field sensor based on magnetostriction by optical frequency-domain reflectometryFormat | Member Price | Non-Member Price |
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Paper Abstract
The distributed optical fiber magnetic field sensors have a capability of spatially resolving the magnetic field along the
entire sensing fiber that is distinguishes from other sensing methods. We present a distributed optical fiber magnetic field
sensor based on magnetostriction using Rayleigh backscattering spectra shift in OFDR (optical frequency-domain
reflectometry). As the spectral shift of Rayleigh backscattering can be used to achieve a distributed strain measurements
with high sensitivity and high spatial resolution using OFDR. In the proposed sensor, the magnetostrictive Fe-Co-V alloy
thin films as sensing materials are attached to a 51 m standard single mode fiber (SMF). We detect the strain coupled to
SMF caused by variation of magnetic field by measuring Rayleigh Backscattering spectra shift in OFDR. In our
experiment, we measure the range of the magnetic field is from 12.9 mT~143.3 mT using proposed method. The
minimal measurable magnetic field variation is 12.9 mT when the spatial resolution is 4 cm. The minimal measurable
magnetic field variation can be improved to 5.3 mT by increasing the spatial resolution to 14 cm. Moreover, we present
the simulation result of two dimension (2D) distribution for the static magnetic field using the Maxwell software
program.
Paper Details
Date Published: 13 March 2015
PDF: 6 pages
Proc. SPIE 9369, Photonic Instrumentation Engineering II, 93690I (13 March 2015); doi: 10.1117/12.2078251
Published in SPIE Proceedings Vol. 9369:
Photonic Instrumentation Engineering II
Yakov G. Soskind; Craig Olson, Editor(s)
PDF: 6 pages
Proc. SPIE 9369, Photonic Instrumentation Engineering II, 93690I (13 March 2015); doi: 10.1117/12.2078251
Show Author Affiliations
Published in SPIE Proceedings Vol. 9369:
Photonic Instrumentation Engineering II
Yakov G. Soskind; Craig Olson, Editor(s)
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