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Proceedings Paper

Fiber optic sensing of magnetic fields utilizing femtosecond laser sculpted microslots and long period gratings coated with Terfenol-D
Author(s): Graham C. B. Lee; Tom Allsop; Changle Wang; Ron Neal; Philip Culverhouse; David J. Webb
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Paper Abstract

Fiber optic sensors are fabricated for detecting static magnetic fields. The sensors consist of a UV inscribed long period grating with two 50 micron long microslots. The microslots are fabricated using the femtosecond laser based inscribe and etch technique. The microslots and the fiber surface are coated with a magnetostrictive material Terfenol-D. A spectral sensitivity of 1.15 pm/mT was measured in transmission with a working resolution of ±0.2 mT for a static magnetic field strength below 10 mT. These devices also present a different response when the spatial orientation of the fiber was adjusted relative to the magnetic field lines.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340K (28 September 2015); doi: 10.1117/12.2194325
Show Author Affiliations
Graham C. B. Lee, Aston Univ. (United Kingdom)
Tom Allsop, Aston Univ. (United Kingdom)
Changle Wang, Aston Univ. (United Kingdom)
Ron Neal, Plymouth Univ. (United Kingdom)
Philip Culverhouse, Plymouth Univ. (United Kingdom)
David J. Webb, Aston Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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