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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 7 — Mar. 26, 2012
  • pp: 6860–6869

Optimization of a DPP-BOTDA sensor with 25 cm spatial resolution over 60 km standard single-mode fiber using Simplex codes and optical pre-amplification

Marcelo A. Soto, Mohammad Taki, Gabriele Bolognini, and Fabrizio Di Pasquale  »View Author Affiliations


Optics Express, Vol. 20, Issue 7, pp. 6860-6869 (2012)
http://dx.doi.org/10.1364/OE.20.006860


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Abstract

Sub-meter distributed optical fiber sensing based on Brillouin optical time-domain analysis with differential pulse-width pairs (DPP-BOTDA) is combined with the use of optical pre-amplification and pulse coding. In order to provide significant measurement SNR enhancement and to avoid distortions in the Brillouin gain spectrum due to acoustic-wave pre-excitation, the pulse width and duty cycle of Simplex coding based on return-to-zero pulses are optimized through simulations. In addition, the use of linear optical pre-amplification increases the receiver sensitivity and the overall dynamic range of DPP-BOTDA measurements. Experimental results demonstrate for first time a spatial resolution of ~25 cm over a 60 km standard single-mode fiber (equivalent to ~240k discrete sensing points) with temperature resolution of 1.2°C and strain resolution of 24 με.

© 2012 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: December 14, 2011
Revised Manuscript: January 13, 2012
Manuscript Accepted: January 16, 2012
Published: March 12, 2012

Citation
Marcelo A. Soto, Mohammad Taki, Gabriele Bolognini, and Fabrizio Di Pasquale, "Optimization of a DPP-BOTDA sensor with 25 cm spatial resolution over 60 km standard single-mode fiber using Simplex codes and optical pre-amplification," Opt. Express 20, 6860-6869 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-6860


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References

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