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Title: Simultaneous interrogation of interferometric and bragg grating sensors
Authors: Kalli, Kyriacos 
Johnson, David A.
Webb, David J. 
Keywords: Bragg gratings;Diffraction gratings;Mirrors;Interferometry
Issue Date: 1995
Publisher: Spie Digital Library
Source: Distributed and Multiplexed Fiber Optic Sensors V,22-23 June 1995,Munich, Germany
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 ≈0.05 με/√Hz at 20 Hz and the interferometric resolution was better than 1 mrad/√Hz at 20 Hz, corresponding to an rms mirror displacement of 0.08 nm.
DOI: 10.1117/12.219627
Rights: © 1995 SPIE.
Type: Conference Papers
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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