Recent progress in slope-assisted Brillouin optical correlation-domain reflectometry

Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Brillouin optical correlation-domain reflectometry (BOCDR) is one of the fiber-optic Brillouin-based distributed sensing techniques for strain and temperature with single-end accessibility. Since the first proposal of the basic concept in 2008, the performance of BOCDR has been drastically improved from a variety of aspects including high-speed operation. Here, we focus on one of the high-speed BOCDR configurations referred to as slope-assisted (SA-) BOCDR. In this configuration, instead of observing the whole Brillouin gain spectrum, only the spectral power at a certain frequency on the spectrum is detected, leading to frequency-sweep-free high-speed operation and some unique features. In this review paper, we describe the recent advances of SA-BOCDR technology from its principle to characterization and applications. We also discuss the current issues of SA-BOCDR and present a concluding remark.

Original languageEnglish
Article number102312
JournalOptical Fiber Technology
Publication statusPublished - 2020 Oct


  • Brillouin scattering
  • Correlation-domain technique
  • Distributed sensing
  • Optical fiber sensors
  • Optical reflectometry
  • Structural health monitoring

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering


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