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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 10 — May. 15, 2010
  • pp: 1503–1505

High-resolution DPP-BOTDA over 50 km LEAF using return-to-zero coded pulses

Hao Liang, Wenhai Li, Nicolas Linze, Liang Chen, and Xiaoyi Bao  »View Author Affiliations


Optics Letters, Vol. 35, Issue 10, pp. 1503-1505 (2010)
http://dx.doi.org/10.1364/OL.35.001503


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Abstract

Coded optical probe pulses in return-to-zero/non-return-to-zero (RZ/NRZ) formats are used for long-range distance sensing based on a differential pulse-width pair Brillouin optical time-domain analysis (DPP-BOTDA) in order to enhance the spatial resolution and measurement accuracy. It is found that using the RZ format maintains the Brillouin spectral shape, enhances the sensing range and leads to a higher signal-to-noise ratio compared to a single-pulse Brillouin optical time-domain analysis. With 512 bit RZ-coded pulse pairs of 60/55 ns for the DPP-BOTDA, a spatial resolution of 0.5   m and a strain resolution of 12 μ ε (which is equivalent to a 0.7 MHz Brillouin frequency shift) have been achieved over a 50 km large effective area fiber.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(190.4370) Nonlinear optics : Nonlinear optics, fibers

ToC Category:
Nonlinear Optics

History
Original Manuscript: February 3, 2010
Revised Manuscript: March 17, 2010
Manuscript Accepted: March 30, 2010
Published: May 4, 2010

Citation
Hao Liang, Wenhai Li, Nicolas Linze, Liang Chen, and Xiaoyi Bao, "High-resolution DPP-BOTDA over 50 km LEAF using return-to-zero coded pulses," Opt. Lett. 35, 1503-1505 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-10-1503


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References

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