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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 14 — Jul. 15, 2013
  • pp: 16390–16397

Bipolar optical pulse coding for performance enhancement in BOTDA sensors

Marcelo A. Soto, Sébastien Le Floch, and Luc Thévenaz  »View Author Affiliations


Optics Express, Vol. 21, Issue 14, pp. 16390-16397 (2013)
http://dx.doi.org/10.1364/OE.21.016390


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Abstract

A pump signal based on bipolar pulse coding and single-sideband suppressed-carried (SSB-SC) modulation is proposed for Brillouin optical time-domain analysis (BOTDA) sensors. Making a sequential use of the Brillouin gain and loss spectra, the technique is experimentally validated using bipolar complementary-correlation Golay codes along a 100 km-long fiber and 2 m spatial resolution, fully resolving a 2 m hot-spot at the end of the sensing fiber with no distortion introduced by the decoding algorithm. Experimental results, in good agreement with the theory, indicate that bipolar Golay codes provide a higher signal-to-noise ratio enhancement and stronger robustness to pump depletion in comparison to optimum unipolar pulse codes known for BOTDA sensing.

© 2013 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:
Sensors

History
Original Manuscript: April 3, 2013
Revised Manuscript: May 31, 2013
Manuscript Accepted: June 27, 2013
Published: July 2, 2013

Citation
Marcelo A. Soto, Sébastien Le Floch, and Luc Thévenaz, "Bipolar optical pulse coding for performance enhancement in BOTDA sensors," Opt. Express 21, 16390-16397 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-14-16390


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References

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