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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 15 — Jul. 28, 2014
  • pp: 18195–18202

Synthesis of Brillouin frequency shift profiles to compensate non-local effects and Brillouin induced noise in BOTDA sensors

Javier Urricelqui, Mikel Sagues, and Alayn Loayssa  »View Author Affiliations


Optics Express, Vol. 22, Issue 15, pp. 18195-18202 (2014)
http://dx.doi.org/10.1364/OE.22.018195


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Abstract

We present a novel technique for Brillouin optical time domain analysis (BOTDA) sensors that simultaneously compensates non-local effects and reduces Brillouin noise. The technique relies on the wavelength modulation of the optical source to modify the Brillouin interaction between probe and pump waves during their propagation. The resulting Brillouin distribution mimics the wavelength modulation, creating a virtual Brillouin frequency shift profile along the sensing fiber. The fundamentals of the technique are first described theoretically and using numerical simulations. Then, proof-of-concept experiments demonstrate the capabilities of the system to reduce large variations of the pump power resulting from the interaction with high probe powers and to decrease the Brillouin induced noise enhancing the signal to noise ratio (SNR) of the system. Furthermore, we show, for the first time to our knowledge, measurements of the Brillouin distribution using an injected optical power higher than the Brillouin threshold of the fiber.

© 2014 Optical Society of America

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

ToC Category:
Sensors

History
Original Manuscript: May 7, 2014
Revised Manuscript: July 12, 2014
Manuscript Accepted: July 13, 2014
Published: July 21, 2014

Citation
Javier Urricelqui, Mikel Sagues, and Alayn Loayssa, "Synthesis of Brillouin frequency shift profiles to compensate non-local effects and Brillouin induced noise in BOTDA sensors," Opt. Express 22, 18195-18202 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-15-18195


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References

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