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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 36,
  • Issue 4,
  • pp. 1131-1137
  • (2018)

BOTDA Sensing Employing a Modified Brillouin Fiber Laser Probe Source

Open Access Open Access

Abstract

A theoretical and experimental study has been carried out on a tunable dual pump-probe optical source for distributed Brillouin optical time-domain analysis (BOTDA). The developed source exploits a modified Brillouin ring laser technology and is capable of a tuning range of ∼200 MHz without using phase-locked loop or optical sideband generation techniques, and exhibits a linewidth smaller than 2.5 MHz and ∼0.5 mW power. In BOTDA experiments, the proposed source has demonstrated to be an efficient solution enabling distributed sensing over 10 km single mode fiber with a spatial resolution of ∼4 m, and a strain and temperature resolutions of ∼10 με and ∼0.5 °C respectively.

© 2017 OAPA

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