title: Fiber magnetic-field sensor based on nanoparticle magnetic fluid and Fresnel reflection.
abstract: A simple fiber sensor for magnetic field measurement based on nanoparticle Fe(3)O(4) magnetic fluid and relative Fresnel reflection is presented. The sensor includes only a light source, three couplers, two photodetectors, and two fiber sensing ends. Magnetic fields at different concentrations of magnetic fluid are measured. Magnetic fluid with high concentration can be used for the measurement of weak magnetic fields, while low concentration fluid is used for the measurement of strong magnetic fields. The temperature dependence of the sensor is also addressed.
authors.affiliation: Key Laboratory of Photonic Information Technology of Guangdong Higher Education Institutes, South China Normal University, Guangzhou, 510006, China.
authors.forename: Luan Xiong
authors.initials: LX
authors.lastname: Chen
authors.forename: Xu Guang
authors.initials: XG
authors.lastname: Huang
authors.forename: Jia Hu
authors.initials: JH
authors.lastname: Zhu
authors.forename: Guang Can
authors.initials: GC
authors.lastname: Li
authors.forename: Sheng
authors.initials: S
authors.lastname: Lan