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Simultaneous interrogation of interferometric and Bragg grating sensors

Simultaneous interrogation of interferometric and Bragg grating sensors
Simultaneous interrogation of interferometric and Bragg grating sensors
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.
SPIE - The International Society for Optical Engineering
Brady, G.P.
7cc88d11-84a0-455f-97ba-ed53509782a5
Kalli, Kyriacos
52c6fd86-65ac-4365-ae30-109c9bbce726
Webb, David J.
152e6ec6-b96b-481d-968b-4293e7bd82c5
Jackson, David A.
f3ceeadd-2d23-4b10-9477-9961ceed799a
Reekie, Laurence
61f4bd1d-7369-4017-90d8-d79ace46424a
Archambault, Jean-Luc
15951484-9ecb-438f-8479-42615f65c6e3
Dakin, John P.
Kersey, Alan D.
Brady, G.P.
7cc88d11-84a0-455f-97ba-ed53509782a5
Kalli, Kyriacos
52c6fd86-65ac-4365-ae30-109c9bbce726
Webb, David J.
152e6ec6-b96b-481d-968b-4293e7bd82c5
Jackson, David A.
f3ceeadd-2d23-4b10-9477-9961ceed799a
Reekie, Laurence
61f4bd1d-7369-4017-90d8-d79ace46424a
Archambault, Jean-Luc
15951484-9ecb-438f-8479-42615f65c6e3
Dakin, John P.
Kersey, Alan D.

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, SPIE - The International Society for Optical Engineering.. (doi:10.1117/12.219627).

Record type: Conference or Workshop Item (Paper)

Abstract

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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More information

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

Identifiers

Local EPrints ID: 77032
URI: http://eprints.soton.ac.uk/id/eprint/77032
PURE UUID: 0925ea95-e6a6-4ad0-9c4d-75ee8eb905c3

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Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 23:42

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Contributors

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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