An active demodulation system for multiplexed FBG sensors

B. Guan, X. Dong, Z. Liu, X. Dong, Hwa Yaw Tam

Research output: Journal article publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)


An active wavelength demodulation approach with high-resolution for fiber Bragg grating (FBG) sensor is proposed and demonstrated for multiplexed temperature measurement in this paper. A tunable fiber laser controlled by computer is used as the scanning light source. And the computer synchronously performs data gathering and processing. Here Gaussian-Newton curve fitting approach is used to determine the Bragg wavelength of the grating sensors. A resolution ∼±0.1pm, corresponding to ∼±0.01°C has been demonstrated using this approach.
Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Jan 2001
Externally publishedYes
EventDistributed Fiber Optical Sensors and Measuring Networks - , Russian Federation
Duration: 1 Jan 2001 → …


  • Demodulation
  • FBG sensor
  • Gaussian-Newton curve fitting
  • Multiplexed temperature sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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