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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 3 — Feb. 2, 2009
  • pp: 1248–1255

Complete discrimination of strain and temperature using Brillouin frequency shift and birefringence in a polarization-maintaining fiber

Weiwen Zou, Zuyuan He, and Kazuo Hotate  »View Author Affiliations

Optics Express, Vol. 17, Issue 3, pp. 1248-1255 (2009)

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This paper presents a novel method that realizes simultaneous and completely discriminative measurement of strain and temperature using one piece of Panda-type polarization-maintaining fibre. Two independent optical parameters in the fiber, the Brillouin frequency shift and the birefringence, are measured by evaluating the spectrum of stimulated Brillouin scattering (SBS) and that of the dynamic acoustic grating generated in SBS to get two independent responses to strain and temperature. We found that the Brillouin frequency shift and the birefringence have the same signs for strain-dependence but opposite signs for temperature-dependence. In experiment, the birefringence in the PMF is characterized with a precision of ~10-8 by detecting the diffraction spectrum of the dynamic acoustic grating. A reproducible accuracy of discriminating strain and temperature as fine as 3 micro-strains and 0.08 degrees Celsius is demonstrated.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 12, 2008
Revised Manuscript: January 14, 2009
Manuscript Accepted: January 14, 2009
Published: January 21, 2009

Weiwen Zou, Zuyuan He, and Kazuo Hotate, "Complete discrimination of strain and temperature using Brillouin frequency shift and birefringence in a polarization-maintaining fiber," Opt. Express 17, 1248-1255 (2009)

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