Athermal fibre Bragg grating strain gauge with metal coating in measurement of thermal expansion coefficient

Yu Lung Lo, Yong Chang Lin, Yung Mien Chen

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This study presents an athermal strain gauge based on fibre Bragg grating (FBG) in measuring thermal expansion coefficient of a low expansion nickel alloy block for demonstration. In order to design an athermal fibre Bragg grating strain gauge, the metal coating is electroless plated onto an optical fibre to function as a thermal compensator. Therefore, the Bragg wavelength will not shift with the ambient temperature change, and only shift regarding to the mechanical strain onto FBG. In measuring the thermal expansion coefficient of a low expansion nickel alloy block, data are in good agreement between the tests by using the athermal FBG and resistance strain gauge techniques. As a result, the athermal strain gauge based on FBG is demonstrated and feasible for the future applications.

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalSensors and Actuators, A: Physical
Volume117
Issue number1
DOIs
Publication statusPublished - 2005 Jan 3

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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