TY - GEN
T1 - Optical fiber fuse effect based sensor for magnetic field monitoring
AU - Alberto, Nélia
AU - Domingues, M. Fátima
AU - Belo, João H.
AU - Marques, Carlos
AU - Antunes, Paulo
AU - Amaral, Vitor
AU - André, Paulo
N1 - Funding Information:
This work is funded by FCT/MEC through national funds and when applicable co-funded by FEDER – PT2020 partnership agreement under the project UID/EEA/50008/2019, within PREDICT (FCT-IT-LA) (N. Alberto) and REAct (FCT-IT-LA) (M.F. Domingues) scientific actions.
Publisher Copyright:
© 2019 SPIE.
PY - 2019
Y1 - 2019
N2 - Magnetic field sensors have been widely applied in several areas, for instance, in navigation, geophysical, aerospace engineering and biomedical research. The traditional methods used to sense this parameter have drawbacks related with size, stability, multiplexing capability, remote measurement and electromagnetic sensitivity. Due to the characteristics inherent to the optical fiber, including small dimensions, immunity to electromagnetic interference and the possibility of being used in hazardous environments, this technology has great potential for sensing different parameters. In this work, the magnetic field was monitored using a Fabry-Perot micro-cavity. The cavity, produced from the recycling of optical fiber previously destroyed by the catastrophic fuse effect, was filled with magnetic fluid (MF). Then, it was exposed to a magnetic field in the range of 0 to 200 mT, applied transversally to the fiber axis. An overall exponential decrease of the wavelength of the reflection spectrum with the increase of the magnetic field was obtained, with a sensitivity and resolution of 120.5 ± 4.4 pm/mT and 8.3 μT, respectively, in the range of 0 to 80 mT (linear behavior). The proposed sensor represents a cost-effective solution for the magnetic field sensing, with an improved performance compared with other devices already reported in the literature.
AB - Magnetic field sensors have been widely applied in several areas, for instance, in navigation, geophysical, aerospace engineering and biomedical research. The traditional methods used to sense this parameter have drawbacks related with size, stability, multiplexing capability, remote measurement and electromagnetic sensitivity. Due to the characteristics inherent to the optical fiber, including small dimensions, immunity to electromagnetic interference and the possibility of being used in hazardous environments, this technology has great potential for sensing different parameters. In this work, the magnetic field was monitored using a Fabry-Perot micro-cavity. The cavity, produced from the recycling of optical fiber previously destroyed by the catastrophic fuse effect, was filled with magnetic fluid (MF). Then, it was exposed to a magnetic field in the range of 0 to 200 mT, applied transversally to the fiber axis. An overall exponential decrease of the wavelength of the reflection spectrum with the increase of the magnetic field was obtained, with a sensitivity and resolution of 120.5 ± 4.4 pm/mT and 8.3 μT, respectively, in the range of 0 to 80 mT (linear behavior). The proposed sensor represents a cost-effective solution for the magnetic field sensing, with an improved performance compared with other devices already reported in the literature.
KW - Fabry-Perot micro-cavity
KW - Fuse effect
KW - Magnetic field
KW - Magnetic fluid
KW - Optical fiber sensor
UR - http://www.scopus.com/inward/record.url?scp=85073899584&partnerID=8YFLogxK
U2 - 10.1117/12.2520759
DO - 10.1117/12.2520759
M3 - Conference contribution
AN - SCOPUS:85073899584
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Sensors 2019
A2 - Baldini, Francesco
A2 - Homola, Jiri
A2 - Lieberman, Robert A.
PB - SPIE
T2 - Optical Sensors 2019
Y2 - 1 April 2019 through 4 April 2019
ER -