Improvement of measurement accuracy of fibre Bragg grating sensor systems by use of gas absorption lines as multi-wavelength references

C. C. Chan, Wei Jin, H. L. Ho, D. N. Wang, Y. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)


A broadband source and a Fabry-Perot tunable filter were used to analyze the wavelength measurement accuracy of fibre Bragg grating (FBG) sensor systems. The smoothed-out versions of measured absorption signals and reflected Bragg signals were fitted to Lorentzian and Gaussian line shapes to determine the centre wavelengths of the absorption lines. The analysis of acetylene absorption lines suggested for a three-FBG sensor system using an external cavity tunable laser demonstrated a wavelength measurement accuracy of 2pm.
Original languageEnglish
Pages (from-to)742-743
Number of pages2
JournalElectronics Letters
Issue number12
Publication statusPublished - 7 Jun 2001

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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