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Proceedings Paper

Magnetic field measurement using a fiber laser sensor in ring arrangement
Author(s): I. M. Nascimento; J. M. Baptista; P. A. S. Jorge; J. L. Cruz ; M. V. Andrés
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Paper Abstract

In this work an optical fiber laser with loop configuration was developed for magnetic field measurement. The transducer element is an FBG written in a HiBi fiber whose wavelength is modified using a magnetostrictive material that applies deformation in the presence of the magnetic field. The laser has a bandwidth of 450 MHz and operates in single polarization. A shift of 258.5 pm was observed in the laser operating wavelength for a magnetic field of 17.85 mT. Moreover, a maximum sensitivity of 14.72 pm/mT in the linear regime operation was achieved when increasing the magnetic field. The system provides a narrow emission line that is dependent on the magnetic field magnitude enabling high resolution interferometric measurement schemes. The laser response to AC magnetic fields was also characterized using a passive interferometer with higher sensitivity in the range of 8.32 to 17.93 mTRMS.

Paper Details

Date Published: 5 May 2015
PDF: 6 pages
Proc. SPIE 9506, Optical Sensors 2015, 95061M (5 May 2015); doi: 10.1117/12.2182644
Show Author Affiliations
I. M. Nascimento, INESC TEC (Portugal)
Univ. do Porto (Portugal)
J. M. Baptista, Univ. da Madeira (Portugal)
P. A. S. Jorge, INESC TEC (Portugal)
J. L. Cruz , Univ. de Valencia (Spain)
M. V. Andrés, Univ. de València (Spain)

Published in SPIE Proceedings Vol. 9506:
Optical Sensors 2015
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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