Brady, G.P., Kalli, Kyriacos, Webb, David J., Jackson, David A., Reekie, Laurence and Archambault, Jean-Luc,
Simultaneous interrogation of interferometric and Bragg grating sensors
Dakin, John P. and Kersey, Alan D. (eds.)
In Distributed and Multiplexed Fiber Optic Sensors V.
The International Society for Optical Engineering..
Full text not available from this repository.
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??/?Hz at 20Hz and the interferometric resolution was better than 1 mrad/?Hz at 20Hz, corresponding to an rms mirror displacement of 0.08nm
Actions (login required)