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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 14 — Jul. 14, 2014
  • pp: 17403–17408

Phasorial differential pulse-width pair technique for long-range Brillouin optical time-domain analysis sensors

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

Optics Express, Vol. 22, Issue 14, pp. 17403-17408 (2014)

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We introduce a novel phasorial differential pulse-width pair (PDPP) method for Brillouin optical time-domain analysis (BOTDA) sensors that combines spatial resolution enhancement with increased tolerance to non-local effects. It is based on the subtraction of the complex time-domain traces supplied by a sensor configuration that uses a phase-modulated probe wave and RF demodulation. The fundamentals of the technique are first described theoretically and using numerical simulation of the propagating waves. Then, proof-of-concept experiments demonstrate the measurement of the Brillouin frequency shift distribution over 50-km. The system is shown to withstand large variations of the pump power generated by its interaction with a powerful probe wave along the fiber; hence, highlighting the potential of the PDPP technique to increase the detected signal-to-noise ratio in long-range BOTDA. Moreover, the PDPP is also shown to increase the measurement contrast by allowing the use of relatively long duration pulses while retaining 1-m spatial resolution.

© 2014 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:

Original Manuscript: March 25, 2014
Revised Manuscript: May 5, 2014
Manuscript Accepted: May 5, 2014
Published: July 10, 2014

Javier Urricelqui, Mikel Sagues, and Alayn Loayssa, "Phasorial differential pulse-width pair technique for long-range Brillouin optical time-domain analysis sensors," Opt. Express 22, 17403-17408 (2014)

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