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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 27 — Sep. 20, 2010
  • pp: 5020–5025

System optimization of a long-range Brillouin-loss-based distributed fiber sensor

Yongkang Dong, Liang Chen, and Xiaoyi Bao  »View Author Affiliations

Applied Optics, Vol. 49, Issue 27, pp. 5020-5025 (2010)

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We report a high-performance 25 km Brillouin-loss-based distributed fiber sensor through optimizing system parameters. First, the Brillouin spectrum distortion and measurement error induced by the excess amplification on probe pulse are investigated, and the results indicate that a low continuous-wave pump power is essential to decrease the measurement error. Then an optimal pulse pair is determined through the differential Brillouin gain evolution along the entire sensing fiber in a differential pulse-width pair Brillouin optical time domain analysis. Using dispersion-shifted fiber to allow a high-power probe pulse, we realize a 25 km sensing range with a spatial resolution of 30 cm and a strain accuracy of ± 20 με , which we believe is the best performance in such a length, to the best of our knowledge.

© 2010 Optical Society of America

OCIS Codes
(290.5900) Scattering : Scattering, stimulated Brillouin
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing and Sensors

Original Manuscript: May 12, 2010
Revised Manuscript: August 16, 2010
Manuscript Accepted: August 19, 2010
Published: September 10, 2010

Yongkang Dong, Liang Chen, and Xiaoyi Bao, "System optimization of a long-range Brillouin-loss-based distributed fiber sensor," Appl. Opt. 49, 5020-5025 (2010)

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