Trade-off relation between strain dynamic range and spatial resolution in slope-assisted Brillouin optical correlation-domain reflectometry

Heeyoung Lee, Kohei Noda, Yosuke Mizuno, Kentaro Nakamura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Slope-assisted Brillouin optical correlation-domain reflectometry (SA-BOCDR) is one of the high-speed distributed strain sensing techniques, but its strain dynamic range has been limited to approximately 0.15%, which is far from being sufficient for some practical applications. In this paper, we clarify that, unlike widely used time-domain techniques, SA-BOCDR has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off originates from the unique bell-shaped noise floor inherently involved in the Brillouin gain spectrum observed with correlation-domain techniques. We experimentally show that, at the cost of three times lowered spatial resolution, the strain dynamic range of >0.6% can be achieved.

Original languageEnglish
Article number075204
JournalMeasurement Science and Technology
Volume30
Issue number7
DOIs
Publication statusPublished - 2019 Jun 4
Externally publishedYes

Keywords

  • Brillouin scattering
  • distributed optical fiber sensor
  • strain dynamic range

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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