Fiber Bragg grating strain sensor based on fiber laser

Xiufeng Yang, Shaojun Luo, Zhihao Chen, Jun Hong Ng, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

A study on fiber Bragg grating (FBG) strain sensor, based on erbium-doped fiber (EDF) laser, is presented. A strain-sensing element, FBG, also acts as the lasing wavelength selecting component. When strain is applied on the FBG, the laser cavity loss changes, leading to a modification of the laser transient. Strain measurements are obtained in the time domain by simply measuring the EDF laser build-up time. Relative variation in the build-up time of up to 190%, for a strain range from 0 με to 2350 με, is achieved with a resolution corresponding to a strain of better than 2.35 με. This study demonstrates a novel fiber sensor concept and the technical feasibility to develop fiber strain measurement.
Original languageEnglish
Pages (from-to)203-206
Number of pages4
JournalOptics Communications
Volume271
Issue number1
DOIs
Publication statusPublished - 1 Mar 2007

Keywords

  • Fiber Bragg gratings (FBGs)
  • Fiber lasers
  • Fiber strain sensor

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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