Demodulation of polarimetric optical fibre sensors by dispersive Fourier transform spectroscopy

D. A. Flavin, R. McBride, J. D C Jones

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We describe an interrogation technique for polarimetric optical fibre sensors, based on the measurement of the differential group delay between the eigenmodes of the birefringent sensing element by tandem interferometry using a low-coherence source. Measurement of the group delay has the advantage of avoiding the 2 p rad ambiguity inherent in the phase measurement. This differential group delay is strongly dispersive, inhibiting measurement using central fringe identification. We measure the delay by dispersive Fourier transform spectroscopy, thus avoiding the errors introduced by dispersion. We demonstrate the application of this technique to temperature and strain measurement. © 1998 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)367-373
Number of pages7
JournalOptics Communications
Issue number4-6
Publication statusPublished - 15 Nov 1998


  • Highly birefringent fibre
  • Low-coherence interferometry
  • Optical fibre sensing
  • Polarimetry


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