Header menu link for other important links
X
Multi-point dynamic strain sensing using external modulation-based Brillouin optical correlation domain analysis
Bhargav Somepalli, ,
Published in OSA - The Optical Society
2019
PMID: 31503707
Volume: 27
   
Issue: 14
Pages: 19486 - 19502
Abstract
We report a novel technique to detect dynamic strain variations simultaneously at multiple locations. Our technique is based on Brillouin optical correlation domain analysis implemented through external modulation to generate multiple independently-accessible correlation peaks within the sensing fiber. Experiments are carried out to demonstrate the precise determination of Brillouin frequency shift (BFS) from multiple locations independently. As a proof of principle, two correlation peaks are generated within a 1 km long fiber and their independent tunability is verified experimentally by mapping the spatial profile of the two correlations. We also experimentally demonstrate the detection of dynamic strain variations at two locations simultaneously, each with a spatial resolution of 60 cm over 100 m long fiber. © 2019 Optical Society of America.
About the journal
JournalData powered by TypesetOptics Letters
PublisherData powered by TypesetOSA - The Optical Society
ISSN01469592
Impact Factor1.230
Open AccessYes
Citation Styleunsrt
Sherpa RoMEO Archiving PolicyGreen
Concepts (13)
  •  related image
    Location
  •  related image
    Modulation
  •  related image
    OPTICAL SIGNAL PROCESSING
  •  related image
    BRILLOUIN FREQUENCY SHIFTS
  •  related image
    BRILLOUIN OPTICAL CORRELATION DOMAIN ANALYSIS
  •  related image
    Correlation peaks
  •  related image
    EXTERNAL MODULATION
  •  related image
    Novel techniques
  •  related image
    PRECISE DETERMINATIONS
  •  related image
    Proof of principles
  •  related image
    Spatial resolution
  •  related image
    Optical correlation
  •  related image
    Article