Fiber optic sensing of magnetic fields utilizing femtosecond laser sculpted microslots and long period gratings coated with Terfenol-D

Lee, Graham C.B., Allsop, Thomas D.P., Wang, Changle, Neal, Ron, Culverhouse, Philip and Webb, David J. (2015). Fiber optic sensing of magnetic fields utilizing femtosecond laser sculpted microslots and long period gratings coated with Terfenol-D. IN: 24th international conference on Optical Fibre Sensors. Kalinowski, Hypolito J.; Fabris, José Luís and Bock, Wojtek J. (eds) SPIE proceedings . Bellingham, WA (US): SPIE.

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.

Publication DOI: https://doi.org/10.1117/12.2194325
Divisions: Engineering & Applied Sciences > Institute of Photonics
Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: Graham C. B. Lee ; Tom Allsop ; Changle Wang ; Ron Neal ; Philip Culverhouse and David J. Webb, "Fiber optic sensing of magnetic fields utilizing femtosecond laser sculpted microslots and long period gratings coated with Terfenol-D", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340K (September 28, 2015). Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2194325
Event Title: 24th international conference on Optical Fibre Sensors
Event Type: Other
Event Dates: 2015-09-28 - 2015-10-02
Uncontrolled Keywords: etching,femtosecond laser,long period gratings,magnetic sensing,optical fibers,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
Full Text Link: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2441896
Related URLs: http://www.scopus.com/inward/record.url?scp=84946148782&partnerID=8YFLogxK (Scopus URL)
Published Date: 2015-09-08
Authors: Lee, Graham C.B. ( 0000-0002-9073-685X)
Allsop, Thomas D.P.
Wang, Changle
Neal, Ron
Culverhouse, Philip
Webb, David J. ( 0000-0002-5495-1296)

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