Error compensation in Brillouin optical correlation-domain reflectometry by combining bidirectionally measured frequency shift distributions

Guangtao Zhu, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno

Research output: Contribution to journalArticlepeer-review

Abstract

In standard single-end-access Brillouin optical correlation-domain reflectometry (BOCDR), the systematic error caused by the phase difference between amplitude modulation (AM) and frequency modulation (FM) in the light source can be up to tens of megahertz, causing considerable errors in strain and temperature measurement. In this letter, we develop a new concept of two-end-access BOCDR, in which light is injected into each end of a sensing fiber in turn and the measured results of the Brillouin frequency shift distributions are combined. We numerically show that this configuration can suppress the systematic error caused by the AM-FM phase difference by approximately 90%.

Original languageEnglish
Article number052006
JournalApplied Physics Express
Volume14
Issue number5
DOIs
Publication statusPublished - 2021 May

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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