High-precision FBG demodulation using amplitude ratio curve with sharp peak
作者: Xuezhi ZhangFang SunJunfeng JiangMing FengShuang WangXiaojun FanYining YangTiegen Liu
作者单位: 1School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
2Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin 300072, People’s Republic of China
3Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin 300072, People’s Republic of China
4School of Physics, Nankai University, Tianjin 300071, People’s Republic of China
刊名: Optical Fiber Technology, 2019, Vol.47 , pp.7-14
来源数据库: Elsevier Journal
DOI: 10.1016/j.yofte.2018.11.020
关键词: Fiber Bragg gratingAmplitude ratio curveHigh precision temperature measurement
英文摘要: Abstract(#br)For the fiber Bragg grating (FBG) sensor based on the reflection peak position searching demodulation algorithms, a key problem is that the demodulation precision of measurement signal is seriously limited by the full width half maximum (FWHM) of the FBG reflection spectrum. In this paper, in order to overcome this problem and enhance the measurement precision, we proposed a high-precision demodulation method based on amplitude ratio curve to instead of the FBG reflection spectrum, which can increase the sensing precision significantly. In this method, the Bragg wavelength of FBG is modulated periodically with a sinusoidal function to obtain a series of reflection spectra. Then at each wavelength the amplitude ratio between second harmonic frequency component and fundamental...
全文获取路径: Elsevier  (合作)
影响因子:1.187 (2012)

  • precision 精度
  • demodulation 解调
  • amplitude 振幅
  • curve 弯曲
  • grating 筛分
  • ratio 
  • measurement 测量
  • temperature 温度
  • sharp