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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 20 — Sep. 26, 2011
  • pp: 18917–18926

Efficient dynamic events discrimination technique for fiber distributed Brillouin sensors

Carlos A. Galindez, Francisco J. Madruga, and Jose M. Lopez-Higuera  »View Author Affiliations

Optics Express, Vol. 19, Issue 20, pp. 18917-18926 (2011)

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A technique to detect real time variations of temperature or strain in Brillouin based distributed fiber sensors is proposed and is investigated in this paper. The technique is based on anomaly detection methods such as the RX-algorithm. Detection and isolation of dynamic events from the static ones are demonstrated by a proper processing of the Brillouin gain values obtained by using a standard BOTDA system. Results also suggest that better signal to noise ratio, dynamic range and spatial resolution can be obtained. For a pump pulse of 5 ns the spatial resolution is enhanced, (from 0.541 m obtained by direct gain measurement, to 0.418 m obtained with the technique here exposed) since the analysis is concentrated in the variation of the Brillouin gain and not only on the averaging of the signal along the time.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:

Original Manuscript: June 8, 2011
Revised Manuscript: July 20, 2011
Manuscript Accepted: July 26, 2011
Published: September 14, 2011

Carlos A. Galindez, Francisco J. Madruga, and Jose M. Lopez-Higuera, "Efficient dynamic events discrimination technique for fiber distributed Brillouin sensors," Opt. Express 19, 18917-18926 (2011)

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