FBG sensor interrogation based on RF signal measurement

Xinyong Dong, Li Yang Shao, H. Y. Fu, Hwa Yaw Tam, Chao Lu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

A novel interrogation method for optical fiber Bragg grating (FBG) sensors has been proposed by converting the change of the FBG wavelength into the phase difference between two radio frequency (RF) signals. As a result, the beating-induced RF signal power changes with the FBG wavelength shift. This technique could be used for high speed FBG interrogation and, due to the use of a second FBG to produce the reference RF signal, temperature cross-sensitivity effect is compensated automatically. Theoretical analysis and experimental demonstration have been carried out. Performances of the FBG sensor interrogation scheme have been studied.
Original languageEnglish
Title of host publication19th International Conference on Optical Fibre Sensors
Volume7004
DOIs
Publication statusPublished - 26 Jun 2008
Event19th International Conference on Optical Fibre Sensors - Perth, WA, Australia
Duration: 15 Apr 200818 Apr 2008

Conference

Conference19th International Conference on Optical Fibre Sensors
Country/TerritoryAustralia
CityPerth, WA
Period15/04/0818/04/08

Keywords

  • Fiber Bragg grating sensor
  • Interrogation
  • Photodetector
  • Radio frequency

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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