Fibre Bragg grating sensor interrogation using an acousto-optic tunable filter and low-coherence interferometry

D.C.C. Norman, David J. Webb

Research output: Contribution to journalArticlepeer-review

Abstract

We describe how an acousto-optic tunable filter can be used to both demultiplex the signals from multiple fibre Bragg grating sensors and simultaneously provide wide bandwidth signal demodulation in a system using interferometric wavelength shift detection. In an experimental demonstration, the approach provided a noise limited strain resolution of 24.9 nε Hz -1/2 at 15 Hz. © 2007 IOP Publishing Ltd.

Original languageEnglish
Pages (from-to)2967-2971
Number of pages5
JournalMeasurement Science and Technology
Volume18
Issue number9
DOIs
Publication statusPublished - Sep 2007

Keywords

  • AOTF
  • FBG
  • optical fibre sensor

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