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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Comparative Study of Distributed Acoustic Sensing Responses in Telecommunication Optical Cables.

Abdulfatah A G Abushagur1,2, Mohd Ridzuan Mokhtar1,2, Noor Shafikah Md Rodzi1,2

  • 1Centre of Fibre Networking and Communication, COE for Intelligent Network, Multimedia University, Cyberjaya 63100, Malaysia.

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Summary
This summary is machine-generated.

Distributed Acoustic Sensing (DAS) performance varies significantly across different telecom cables. Experimental comparisons reveal the Microcable offers the highest signal amplitude and SNR for DAS applications.

Keywords:
acoustic monitoringdistributed acoustic sensing (DAS)infrastructure monitoringoptical fibre sensingtelecommunication cables

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Area of Science:

  • Geophysics
  • Optical Engineering
  • Materials Science

Background:

  • Distributed Acoustic Sensing (DAS) leverages optical fibers for acoustic monitoring.
  • Telecom cable construction impacts DAS performance due to varying strain transfer efficiency.

Purpose of the Study:

  • To experimentally compare the DAS signal amplitudes of three commercial telecommunication optical cables.
  • To identify which cable types are most suitable for DAS-based monitoring.

Main Methods:

  • Benchtop testing with a Rayleigh backscattering-based interrogator.
  • Controlled laboratory conditions to isolate strain-induced variations.
  • Comparative analysis of signal amplitude and signal-to-noise ratio (SNR).

Main Results:

  • Microcable demonstrated the highest spatial peak amplitude (up to 0.029 a.u.) and SNR (up to 79).
  • Duct cable yielded lower amplitude (0.00268 a.u.) with a mean SNR of approximately 32.
  • Anti-Rodent cable showed low amplitude (0.0018 a.u.) but high mean SNR (≈111) due to a low noise floor in specific runs.

Conclusions:

  • Cable construction significantly influences DAS signal characteristics.
  • Microcable is a promising candidate for DAS applications requiring high signal amplitude and SNR.
  • Findings aid in selecting appropriate telecom cables for effective DAS deployments.