Magnetic Field Sensor Based on Backscattered Intensity Using Ferrofluid

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...

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Bibliographic Details
Published inIEEE 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
LanguageEnglish
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
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Summary: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 sensor shows the same response when used in remote and multiplexed configurations, demonstrating the high potential and versatility of this sensing approach.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2013.2267812