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OTDR-based technique for detecting signals of FBG sensors in the wide spectral range for measuring strain and temperature

  • Yuri Kulchin*
  • , Oleg Vitrik
  • , Anton Dyshlyuk
  • , Zhi Zhou
  • , Jinping Ou
  • *Corresponding author for this work
  • Institute of Automation and Control Processes FEB RAS
  • Dalian University of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The paper presents a reflectometric technique for interrogation of multiple fiber Bragg grating (FBG) sensors based on conventional optical time domain reflectometery (OTDR). The method proposed rests on the differential measurement of FBGs' response to a short probing laser pulse. Implementation of differential measurement principle using several reference FBGs allowed us to eliminate the susceptibility of the system to intensity fluctuations as well as to increase the measurement range as compared to the previous developments. The experimental threshold sensitivity amounted to ∼50 μstrain with the measurement range being defined by the number of reference FBGs and limited only by optical fiber tensile strength. Due to its simplicity, efficiency and usage of conventional OTDR equipment the proposed FBG interrogation technique can find a wide range of applications dealing with strain and temperature measurements.

Original languageEnglish
Title of host publication10th International Symposium on Measurement and Quality Control 2010, ISMQC 2010
Pages30-32
Number of pages3
StatePublished - 2010
Externally publishedYes
Event10th International Symposium on Measurement and Quality Control 2010, ISMQC 2010 - Osaka, Japan
Duration: 5 Sep 20109 Sep 2010

Publication series

Name10th International Symposium on Measurement and Quality Control 2010, ISMQC 2010

Conference

Conference10th International Symposium on Measurement and Quality Control 2010, ISMQC 2010
Country/TerritoryJapan
CityOsaka
Period5/09/109/09/10

Keywords

  • FBG interrogation
  • OTDR
  • Strain sensor
  • Temperature sensor

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