[INVITED] State of the art of Brillouin fiber-optic distributed sensing

Avi Motil*, Arik Bergman, Moshe Tur

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Fiber-optic distributed sensing, employing the Brillouin effect, is already a commercially available measurement technique for the accurate estimation of the static strain/temperature fields along tens of kilometers with a spatial resolution of the order of a meter. Furthermore, relentless research efforts are paving the way to even much wider usability of the technique through recently achieved enhanced performance in each of its critical dimensions: measurement range has been extended to hundreds of kilometers; spatial resolution is of the order of a centimeter or less, signal to noise ratio has been significantly improved; fast dynamic events can be captured at kHz's sampling rates; and a much better understanding of the underlying physics has been obtained, along with the formulation of figures of merit, and the preparation and early adoption of appropriate standards and guidelines. This paper describes the basics, as well as the state of the art, of the leading Brillouin interrogation methods, with emphasis on the significant progress made in the last 3 years. It also includes a short introduction to coding, which has proven instrumental in many of the recently obtained performance records.

Original languageEnglish
Pages (from-to)81-103
Number of pages23
JournalOptics and Laser Technology
Volume78
DOIs
StatePublished - 1 Apr 2016

Keywords

  • Brillouin scattering
  • Fiber optic distributed sensing
  • Fiber optic sensing
  • Fiber sensors
  • Nonlinear optics

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