Magnetic field strength measurement using tailored dispersion characteristics of phase-shifted fibre Bragg gratings
Orr, Philip and Niewczas, Pawel and Stevenson, Michael and Canning, John (2010) Magnetic field strength measurement using tailored dispersion characteristics of phase-shifted fibre Bragg gratings. In: Fourth European Workshop on Optical Fibre Sensors, 2010-09-08 - 2010-09-10. (https://doi.org/10.1117/12.865456)
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Magneto-optical activity giving rise to circular birefringence and Faraday rotation is not usually an appropriate basis for point measurement of magnetic field strength, acting as it must over extended lengths. In this paper we report on investigations into the dispersion characteristics of structured fibre Bragg gratings for the purposes of implementing novel polarimetric point sensors. Phase-shifts inscribed along the grating profile introduce windows in transmission that correspond to highly resonant wavelengths undergoing large group delay. We demonstrate through fabrication of structured gratings that their dispersion characteristics can be tailored, producing regions of spectrally co-located reflection and large group delay. Importantly, it is shown how a number of such regions can contribute to a single enhanced group delay in reflection. Through simulation we discuss the potential for implementing polarimetric magnetic field sensors which operate in reflection.
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Item type: Conference or Workshop Item(Paper) ID code: 37273 Dates: DateEvent8 September 2010PublishedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 01 Feb 2012 12:01 Last modified: 09 Apr 2024 05:39 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/37273