Brillouin Optical Correlation Domain Analysis Enhanced by Time-Domain Data Processing for Concurrent Interrogation of Multiple Sensing Points

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

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

We propose and experimentally demonstrate a Brillouin optical correlation domain analysis system adopting time-domain data processing and differential measurement for simultaneous interrogation of multiple sensing points. Continuous probe and pulsed pump waves are simultaneously frequency-modulated by a MHz-order sinusoidal RF wave so that multiple correlation peaks are sequentially generated according to the propagation of the pump along a fiber under test (FUT). The Brillouin gain spectrum of each correlation peak is obtained and interrogated by moving window averaging of the probe wave with a span of the period of the RF modulation, leading to the simultaneous monitoring of the multiple sensing points. In experiments, 148 correlation peaks are concurrently interrogated with a spatial resolution less than 3 cm along a 1530 m FUT.

Original languageEnglish
Article number8030064
Pages (from-to)5311-5316
Number of pages6
JournalJournal of Lightwave Technology
Volume35
Issue number24
DOIs
Publication statusPublished - 2017 Dec 15

Bibliographical note

Funding Information:
Manuscript received March 17, 2017; revised June 22, 2017, July 28, 2017, and August 10, 2017; accepted August 29, 2017. Date of publication September 7, 2017; date of current version November 27, 2017. This work was supported by the R&D Program (2E26970) funded by Korea Institute of Science and Technology. (Corresponding Author: Kwanil Lee.) G. Ryu is with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea, and also with the Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea (e-mail: 215505@kist.re.kr).

Publisher Copyright:
© 1983-2012 IEEE.

Keywords

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

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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