Novel active fiber Bragg grating sensor system for monitoring mechanical vibration in real-time

Youlong Yu, Shuwei Geng, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


A pair of fiber Bragg gratings with the wavelengths of 1562.11 nm and 1562.71 nm, respectively, are used as the end reflectors of a constructed linear cavity fiber laser. They are epoxied onto the upper and lower surfaces of an employed uniform density and thickness isosceles triangle cantilever beam axially. As a strain agent, the beam makes the wavelength-shifts of both gratings be changeable, and therefore lead the laser producing pulses. The real-time measurements of the frequency of the mechanical vibration applied on the free end of the beam are demonstrated by observing the pulses. Within the range of 0-6.1 mm, the amplitude of the vibration can be estimated by observing the wavelength-shift-difference between two gratings. The measured results have been demonstrated to be in good agreement with the actual values under the frequency of 100 Hz.
Original languageChinese (Simplified)
Pages (from-to)293-296
Number of pages4
JournalGuangxue Xuebao/Acta Optica Sinica
Issue number3
Publication statusPublished - 1 Mar 2003


  • Cantilever beam
  • Fiber Bragg grating
  • Fiber laser
  • Linear cavity
  • Mechanical vibration
  • Sensor technique

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • General Physics and Astronomy
  • Atomic and Molecular Physics, and Optics

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