Simultaneous multi-parameter monitoring using a serial fibre-Fabry-Perot array with low-coherence and wavelength-domain detection

P J Henderson, Y J Rao, D A Jackson, L Zhang, I Bennion

Research output: Contribution to journalArticlepeer-review

Abstract

A sensor multiplexing scheme for the simultaneous monitoring of dynamic strain and temperature is presented. The scheme combines low-coherence and wavelength-division signal processing with a serial array of fibre-Fabry-Pérot (FFP) interferometric sensors defined by in-fibre grating mirrors of matched Bragg wavelength. Heterodyne measurements of signal phase from a 39 cm long FFP interferometer result in a dynamic strain resolution of about at acoustic frequencies. Temperature measurements via the induced changes in Bragg wavelength have a sensitivity of about . The cross-talk between the strain and temperature channels is within the system noise.
Original languageEnglish
Pages (from-to)1837-1839
JournalMeasurement Science and Technology
Volume9
Issue number11
DOIs
Publication statusPublished - 1 Nov 1998

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