What is Distributed Acoustic Sensing (DAS)?

Distributed Acoustic Sensing (DAS) is a technology that enables continuous, real-time measurements along the entire length of a fiber optic cable.  Unlike traditional sensors that rely on discrete sensors measuring at pre-determined points, distributed sensing utilizes the optical fibre. The optical fiber is the sensing element.

AcoustiSens® Wideband Single-Mode Optical Fiber, the newest addition to the OFS LineaSens® family, is a vibration sensing fiber with optimal performance for DAS systems.  Using a waveguide design based on the ITU-T G.657.A1 telecom-grade single-mode standard, AcoustiSens Wideband Optical Fibers significantly increase Rayleigh backscatter while maintaining low attenuation to improve Optical Signal to Noise Ratio (OSNR).  Furthermore, the AcoustiSens Wideband Optical Fibers provide bend-insensitivity and expand the operating wavelength band (1536 – 1556 nm) ensuring interoperability with all known DAS interrogators.

AcoustiSens Wideband is intended for use in cables designed as sensing components in DAS systems. Without the need for changes in interrogation equipment or complex optical amplification schemes AcoustiSens Wideband is a drop-in fiber replacement that provides greatly improved sensing performance with OSNR orders of magnitude better than telecom-standard fibers.  This translates into significantly improved ASNR in DAS systems.  Due to its waveguide design, AcoustiSens fibers are also bend-insensitive and splice compatible with G.657.A1 and G.652.D optical fibers, assuring smooth integration with commonly deployed sensing solutions.

AcoustiSens Optical Fibers are intended for use as components in optical and hybrid cables designed for vibration or acoustic sensing applications including:

  • Pipeline monitoring (midstream)
  • Rail monitoring
  • Perimeter monitoring
  • Subsea monitoring
  • Highway monitoring
  • Smart City applications

To learn more about AcoustiSens watch this video overview or visit the OFS website.  Or you may contact us to discuss solutions to your sensing needs.