Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 17,
  • Issue 4,
  • pp. 312-316
  • (2013)

A Fiber Laser Spectrometer Demodulation of Fiber Bragg Grating Sensors for Measurement Linearity Enhancement

Open Access Open Access

Abstract

A novel fiber-optic sensor system is suggested in which fiber Bragg grating sensors are demodulated by a wavelength-sweeping fiber laser source and a spectrometer. The spectrometer consists of a diffraction grating and a 512-pixel photo-diode array. The reflected Bragg wavelength information is transformed into spatial intensity distribution on the photo-diode array. The peak locations linearly correspond to the Bragg wavelengths, regardless of the nonlinearities in the wavelength tuning mechanism of the fiber laser. The high power density of the fiber laser enables obtaining high signal-to-noise ratio outputs. The improved demodulation characteristics were experimentally demonstrated with a fiber Bragg grating sensor array with 5 gratings. The sensor outputs were in much more linear fashion compared with the conventional tunable band-pass filter demodulation. Also it showed advantages in signal processing, due to the high level of photo-diode array signals, over the broadband light source system, especially in measurement of fast varying dynamic physical quantities.

© 2013 Optical Society of Korea

PDF Article
More Like This
Development of a parallel demodulation system used for extrinsic Fabry-Perot interferometer and fiber Bragg grating sensors

Junfeng Jiang, Tiegen Liu, Yimo Zhang, Lina Liu, Ying Zha, Fan Zhang, Yunxin Wang, and Pin Long
Appl. Opt. 45(3) 528-535 (2006)

Grating sensor array demodulation by use of a passively mode-locked fiber laser

Michael L. Dennis, Martin A. Putnam, Jin U. Kang, Tsung-Ein Tsai, Irl N. Duling, and E. Joseph Friebele
Opt. Lett. 22(17) 1362-1364 (1997)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.


Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved