High-Spatial-Resolution Distributed Strain Measurement in Optical Fiber with Rayleigh Scatter
Applied Optics, Vol. 37, Issue 10, pp. 1735-1740 (1998)
http://dx.doi.org/10.1364/AO.37.001735
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Abstract
A method of measuring strain over 30-cm intervals to an accuracy of10 microstrain in unaltered low-loss communications-grade single-modeoptical 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
[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
Citation
Mark Froggatt and Jason Moore, "High-Spatial-Resolution Distributed Strain Measurement in Optical Fiber with Rayleigh Scatter," Appl. Opt. 37, 1735-1740 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-10-1735
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