Active interrogation technique for wavelength-division-multiplexed fiber Bragg grating sensor system

Youlong Yu, Hwa Yaw Tam, Wenghong Chung

Research output: Journal article publicationJournal articleAcademic researchpeer-review


An active interrogation technique for a 16-cascaded wavelength-division multiplexing fiber Bragg grating sensor system is proposed. The system has been demonstrated using a combination of a feedback control technique, which makes the transmission of an employed tunable F-P filter track the Bragg wavelength of the interrogated sensor automatically, and a technique for choosing the output wavelength of a ring-compounded-cavity fiber laser by tuning the applied voltage of the filter. Demodulated by using an unbalanced scanning Michelson interferometer, a sensitivity of 1.682 Deg/με has been achieved.
Original languageEnglish
Pages (from-to)277-281
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Jan 2001


  • Demodulation and fiber Bragg grating sensor system
  • Fiber Bragg grating
  • Interrogation
  • Ring-cavity fiber laser
  • Wavelength-division multiplexed

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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