Distributed optical fiber dynamic magnetic field sensor based on magnetostriction

作者：Ali Masoudi, Trevor P. Newson · 发表于：Applied Optics · 年份：2014 · DOI：10.1364/ao.53.002833 · 被引用次数：36 · 研究领域：Advanced Fiber Optic Sensors、Magneto-Optical Properties and Applications、Photonic and Optical Devices

A distributed optical fiber sensor is introduced which is capable of quantifying multiple magnetic fields along a 1 km sensing fiber with a spatial resolution of 1 m. The operation of the proposed sensor is based on measuring the magnetorestrictive induced strain of a nickel wire attached to an optical fiber. The strain coupled to the optical fiber was detected by measuring the strain-induced phase variation between the backscattered Rayleigh light from two segments of the sensing fiber. A magnetic field intensity resolution of 0.3 G over a bandwidth of 50-5000 Hz was demonstrated.