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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 10 — Apr. 1, 2008
  • pp: 1668–1672

Simultaneous measurement for strain and temperature using fiber Bragg gratings and multimode fibers

Da-Peng Zhou, Li Wei, Wing-Ki Liu, Yu Liu, and John W. Y. Lit  »View Author Affiliations

Applied Optics, Vol. 47, Issue 10, pp. 1668-1672 (2008)

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An all-fiber sensor capable of simultaneous measurement of temperature and strain is newly presented. The sensing head is formed by a fiber Bragg grating combined with a section of multimode fiber that acts as a Mach–Zehnder interferometer for temperature and strain discrimination. The strain and temperature coefficients of multimode fibers vary with the core sizes and materials. This feature can be used to improve the strain and temperature resolution by suitably choosing the multimode fiber. For a 10 pm wavelength resolution, a resolution of 9.21 με in strain and 0.26 ° C in temperature can be achieved.

© 2008 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 26, 2007
Revised Manuscript: January 22, 2008
Manuscript Accepted: February 16, 2008
Published: March 31, 2008

Da-Peng Zhou, Li Wei, Wing-Ki Liu, Yu Liu, and John W. Y. Lit, "Simultaneous measurement for strain and temperature using fiber Bragg gratings and multimode fibers," Appl. Opt. 47, 1668-1672 (2008)

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