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A novel fiber Bragg grating sensor interrogator based on time division multiplexing technique

  • Harbin Institute of Technology
  • Nanyang Technological University

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

Abstract

A novel fiber Bragg grating (FBG) sensor system for Structure Health Monitoring (SHM) is proposed in this paper. The proposed sensor technique is based on time division multiplexing (TDM). This technique utilizes semiconductor optical amplifier (SOA) as a gain medium and switch. The SOA is driven by a pulse generator which switch on the SOA at different periods, as a switch to select the reflected pulses from a particular sensor. The FBG sensors have identical center wavelengths and can be deployed along the same fiber. This technique relieves the spectral bandwidth issue and permits the interrogation of up to 100 FBGs along a fiber. The sensor system has a fast signal process and control unit, which have a typical scan frequency in 50 Hz and self-adaptive measurement for simple sensor array installation.

Original languageEnglish
Title of host publication2nd International Conference on Smart Materials and Nanotechnology in Engineering
DOIs
StatePublished - 2009
Event2nd International Conference on Smart Materials and Nanotechnology in Engineering - Weihai, China
Duration: 8 Jul 200911 Jul 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7493
ISSN (Print)0277-786X

Conference

Conference2nd International Conference on Smart Materials and Nanotechnology in Engineering
Country/TerritoryChina
CityWeihai
Period8/07/0911/07/09

Keywords

  • Fiber Bragg grating sensor
  • Time division multiplexing

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