Distributed magnetic field sensor based on magnetostriction using Rayleigh backscattering spectra shift in optical frequency-domain reflectometry

作者：Yang Du, Tiegen Liu, Zhenyang Ding, Kun Liu, Bowen Feng, Junfeng Jiang · 发表于：Applied Physics Express · 年份：2014 · DOI：10.7567/apex.8.012401 · 被引用次数：32 · 研究领域：Advanced Fiber Optic Sensors、Magneto-Optical Properties and Applications、Photonic and Optical Devices

We present a distributed optical-fiber magnetic-field sensor based on magnetostriction using the Rayleigh backscattering spectra (RBS) shift in optical frequency-domain reflectometry (OFDR). The magnetostrictive Fe–Co–V alloy thin films are attached to a 51-m single-mode fiber (SMF). We detect the strain coupled to the SMF caused by the magnetic field using the RBS shift. We measure the range of the magnetic field to be from 0 to 143.3 mT. The minimum measurable magnetic intensity variation is 12.9 mT when the spatial resolution is 4 cm, and it can be improved to 5.3 mT by deteriorating the spatial resolution to 14 cm.