The effect of the gain dependency of the line width of Brillouin amplification on double slope-assisted dynamic sensing techniques

Avi Motil, Raanan Hadar, Ido Sovran, Moshe Tur

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

Abstract

The effect of the gain dependency of the Brillouin linewidth on double-slope-assisted Brillouin optical domain, dynamic sensing techniques is studied. These double-slope methods are immune to pump-power related peak Brillouin gain variations, however, they are not immune to gain-dependent variations of the shape of the Brillouin gain spectrum. For a 15ns pump pulse, this gain-dependent shape of the normalized Brillouin gain is shown to lead to a 5.5 [%/dB] strain error when the double-slope sum-difference approach is used, compared with a 7 [%/dB] error when the double-slope ratio approach is used. Ways to compensate for these issues are discussed.

Original languageEnglish
Title of host publication24th International Conference on Optical Fibre Sensors, OFS 2015
EditorsHypolito Jose Kalinowski, Jose Luis Fabris, Wojtek J. Bock
PublisherSPIE
ISBN (Electronic)9781628418392
DOIs
StatePublished - 2015
Event24th International Conference on Optical Fibre Sensors, OFS 2015 - Curitiba, Brazil
Duration: 28 Sep 20152 Oct 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9634
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference24th International Conference on Optical Fibre Sensors, OFS 2015
Country/TerritoryBrazil
CityCuritiba
Period28/09/152/10/15

Keywords

  • Brillouin gain spectrum (BGS)
  • Brillouin optical time domain analysis (BOTDA)
  • Dynamic sensing
  • Fiber optic sensors
  • Stimulated brillouin scattering (SBS)

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