Distributed and dynamic monitoring of 4km/sec waves using a Brillouin fiber-optic strain sensor

Yair Peled, Lior Yaron, Avi Motil, Moshe Tur

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We report a Brillouin-based fully distributed and dynamic monitoring of a strain wave, propagating at a speed of ∼4km/sec in a 6m long fiber. Using an audio speaker, a mechanical impulse was introduced to one end of a 6m long optical fiber, initiating a strain wave propagating towards the other fixed end of the fiber. Employing a simplified version of the Slope-Assisted Brillouin Optical Time Domain Analysis (SA-BOTDA) technique, the whole length of the fiber was interrogated every 1μs (before averaging). A dynamic spatially and temporally continuous map of the strain was obtained, from which the wave velocity could be deduced. With a trade-off among sampling rate, range and signal to noise ratio, kHz sampling rates and hundreds of meters of range can be covered with spatial resolutions down to a few centimeters.

Original languageEnglish
Title of host publicationFifth European Workshop on Optical Fibre Sensors
DOIs
StatePublished - 2013
Event5th European Workshop on Optical Fibre Sensors, EWOFS 2013 - Krakow, Poland
Duration: 19 May 201322 May 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8794
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference5th European Workshop on Optical Fibre Sensors, EWOFS 2013
Country/TerritoryPoland
CityKrakow
Period19/05/1322/05/13

Keywords

  • Brillouin scattering
  • Detection
  • Fiber optics sensors
  • Nonlinear optics

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