Linearly Configured Brillouin Optical Correlation Domain Analysis System Incorporating Time-Domain Data Processing

Gukbeen Ryu, Gyu Tae Kim, Kwang Yong Song, Sang Bae Lee, Kwanil Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We propose a linearly configured Brillouin optical correlation domain analysis system incorporated with time domain data processing, where a fiber under test (FUT) is accessed from single end and multiple sensing points are simultaneously interrogated to extend the measurement range. In our scheme, correlation peaks (CPs) are sequentially generated by the interaction between a pump pulse outgoing from the system and a probe wave reflected from the end of an FUT, where the time-domain data processing is applied to obtain the Brillouin gain spectrum of each CP. In experiments, we demonstrate simultaneous acquisition of Brillouin gain spectra at 982 CPs with a spatial resolution of less than 5 cm and a sensing range extended from 10.3 m to 10.15 km. We also show that the amplitude of frequency modulation (Δf), which has been limited to the Brillouin frequency of an FUT in linear-configured BOCDA systems, can be enlarged without definite limitation by the time-domain data processing. In the experimental confirmation Δf of 15.6 GHz, about 1.5 times of the Brillouin frequency of FUT, is successfully applied to simultaneous analysis of 98 CPs by the time-domain data processing.

Original languageEnglish
Article number8725565
Pages (from-to)4728-4733
Number of pages6
JournalJournal of Lightwave Technology
Volume37
Issue number18
DOIs
Publication statusPublished - 2019 Sep 15

Keywords

  • Optical fiber sensors
  • stimulated Brillouin scattering
  • time domain analysis

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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