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Applied Optics

Applied Optics


  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1735–1740

High-spatial-resolution distributed strain measurement in optical fiber with Rayleigh scatter

Mark Froggatt and Jason Moore  »View Author Affiliations

Applied Optics, Vol. 37, Issue 10, pp. 1735-1740 (1998)

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A method of measuring strain over 30-cm intervals to an accuracy of 10 microstrain in unaltered low-loss communications-grade single-mode optical fiber is presented. The method uses a tunable external cavity diode laser to measure the reflected intensity of a reflector–fiber system as a function of wavelength. This measurement is performed with no strain applied to the fiber to produce a reference and then again after a strain has been induced. Cross correlation of the Rayleigh scatter spectra from a selected section of fiber in the strained and unstrained states determines the spectral shift resulting from the applied strain.

© 1998 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(060.2920) Fiber optics and optical communications : Homodyning
(290.5870) Scattering : Scattering, Rayleigh

Original Manuscript: June 11, 1997
Revised Manuscript: October 20, 1997
Published: April 1, 1998

Mark Froggatt and Jason Moore, "High-spatial-resolution distributed strain measurement in optical fiber with Rayleigh scatter," Appl. Opt. 37, 1735-1740 (1998)

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