Magnetic Field Sensor Based on Backscattered Intensity Using Ferrofluid

• Published in: IEEE photonics technology letters Vol. 25; no. 15; pp. 1481 - 1484
• Main Authors: Candiani, Alessandro, Bravo, Mikel, Pissadakis, Stavros, Cucinotta, Annamaria, Lopez-Amo, Manuel, Selleri, Stefano
• Format: Journal Article
• Language: English
• Published: IEEE 01.08.2013
• Subjects: ferromagnetic materials; magnetic devices; Magnetic domains; Magnetic recording; Magnetometers; Multiplexing; Optical fiber; Optical fiber sensors; Optical fibers; Saturation magnetization

A magnetic field sensor based on backscattered intensity of a single mode fiber immersed in a ferrofluid is experimentally demonstrated. An OTDR system is used to interrogate the reflected power at the fiber end face, revealing >2 dB of modulation for magnetic field changes up to 1525 Gauss. The...