Interrogation of a dual-fibre-Bragg-grating sensor using an arrayed waveguide grating

D.C. Robertson, P. Niewczas, J.R. McDonald

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


In this paper, we consider the possibility of improving the accuracy of a solid-state fiber Bragg grating (FBG) interrogation system by using two, instead of one, FBGs inscribed on the same location of the fiber, with a small difference in the peak wavelength that each reflects. Signal processing can be applied to the outputs of the photodetectors that are connected to an arrayed waveguide grating to provide a linear response from the sensor. We demonstrate here that this method reduces errors when compared to the setup employing a single FBG with the same bandwidth as the dual sensor.
Original languageEnglish
Pages (from-to)2641-2645
Number of pages5
JournalIEEE Transactions on Instrumentation and Measurement
Issue number6
Publication statusPublished - Dec 2007


  • arrayed waveguide gratings
  • fiber Bragg gratings
  • sensor interrogation
  • strain sensors


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