A strain sensing system using a novel optical fibre Bragg grating sensor and a synthetic heterodyne interrogation technique

Thomas D.P. Allsop*, Karen E. Chisholm, Ian Bennion, A. Malvern, Ron Neal

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A potential low cost novel sensing scheme for monitoring absolute strain is demonstrated. The scheme utilizes a synthetic heterodyne interrogation technique working in conjunction with a linearly chirped, sinusoidally tapered, apodized Bragg grating sensor. The interrogation technique is relatively simple to implement in terms of the required optics and the peripheral electronics. This scheme generates an output signal that has a quasi-linear response to absolute strain with a static strain resolution of ~±20 με and an operating range of ~1000 με.

Original languageEnglish
Pages (from-to)731-740
Number of pages10
JournalMeasurement Science and Technology
Volume13
Issue number5
DOIs
Publication statusPublished - May 2002

Keywords

  • fibre Bragg gratings
  • optical fibre sensors
  • strain

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