DAST

The DAST is a new disruptive interrogator equipment for distributed optical fibre sensors that can turn an optical cable, even already existing, into an array of thousands of sensors for SOUND, TEMPERATURE, DEFORMATION and PRESSURE.

Thanks to its patented technology that combines DSTS (Brillouin analysis), DAS (phase-sensitive reflectometry) and polarization-sensitive reflectometry, the DAST creates a “virtual sensor” made out of light pulses that travels along the fibre for many km and reads the different parameters individually at any point.

Moreover, thanks to its unique multi-parameter sensing capability, the DAST allows to correlate the changes detected in different domains that refer to anomalies acting on more of them, such the vibrations that influence both polarization and phase, so that to improve the sensitivity and the false alarm rejection ratio.