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Simultaneous interrogation of interferometric and Bragg grating sensors

Brady, G.P., Kalli, Kyriacos, Webb, David J., Jackson, David A., Reekie, Laurence and Archambault, Jean-Luc, (1995) Simultaneous interrogation of interferometric and Bragg grating sensors Dakin, John P. and Kersey, Alan D. (eds.) In Distributed and Multiplexed Fiber Optic Sensors V. vol. 2507, The International Society for Optical Engineering.. (doi:10.1117/12.219627).

Record type: Conference or Workshop Item (Paper)


A new method for the simultaneous interrogation of conventional two-beam interferometers and Bragg grating sensors is proposed and demonstrated. An unbalanced Mach-Zehnder interferometer illuminated by a low coherence source is used to act as a wavelength tunable source for the grating and as a path matched filter for a Fizeau cavity. The technique gives high phase resolution. The grating sensor gave a dynamic strain resolution of approximately equals 0.05 µ.epsilon/√Hz at 20Hz and the interferometric resolution was better than 1 mrad/√Hz at 20Hz, corresponding to an rms mirror displacement of 0.08nm.

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Published date: 1995
Venue - Dates: Distributed and Multiplexed Fiber Optic Sensors V, Germany, 1995-01-01
Organisations: Optoelectronics Research Centre


Local EPrints ID: 77032
PURE UUID: 0925ea95-e6a6-4ad0-9c4d-75ee8eb905c3

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:35

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Author: G.P. Brady
Author: Kyriacos Kalli
Author: David J. Webb
Author: David A. Jackson
Author: Laurence Reekie
Author: Jean-Luc Archambault
Editor: John P. Dakin
Editor: Alan D. Kersey

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