摘要

The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.
原文英語
文章編號2837
期刊Sensors (Switzerland)
17
發行號12
DOIs
出版狀態已發佈 - 十二月 7 2017

ASJC Scopus subject areas

  • 分析化學
  • 原子與分子物理與光學
  • 生物化學
  • 儀器
  • 電氣與電子工程

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