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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21616–21625

Differential pulse-width pair BOTDA for high spatial resolution sensing

Wenhai Li, Xiaoyi Bao, Yun Li, and Liang Chen  »View Author Affiliations


Optics Express, Vol. 16, Issue 26, pp. 21616-21625 (2008)
http://dx.doi.org/10.1364/OE.16.021616


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Abstract

A differential pulse-width pair Brillouin optical time domain analysis (DPP-BOTDA) for centimeter spatial resolution sensing using meter equivalent pulses is proposed. This scheme uses the time domain waveform subtraction at the same scanned Brillouin frequency obtained from pulse lights with different pulse-widths (e.g. 50ns and 49ns) to form the differential Brillouin gain spectrum (BGS) at each fiber location. The spatial resolution is defined by the average of the rise and fall time equivalent fiber length for a small stress section rather than the pulse-width difference equivalent length. The spatial resolution of 0.18m for the 50/49ns pulse pair and 0.15m for 20/19ns pulse pair over 1km sensing length with Brillouin frequency shift accuracy of 2.6MHz are demonstrated.

© 2008 Optical Society of America

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
(350.5730) Other areas of optics : Resolution

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 5, 2008
Revised Manuscript: December 10, 2008
Manuscript Accepted: December 10, 2008
Published: December 15, 2008

Citation
Wenhai Li, Xiaoyi Bao, Yun Li, and Liang Chen, "Differential pulse-width pair BOTDA for high spatial resolution sensing," Opt. Express 16, 21616-21625 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-26-21616


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References

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