DAS Technology

What is a Distributed Acoustic Sensor (DAS)?

A DAS interrogator converts a standard communications single mode fibre into thousands of extremely sensitive acoustic and vibration sensors.

The Distributed Acoustic Sensor connected to one end of the fibre uses a laser to send thousands of short pulses of light along the fibre every second. A small proportion of the light travelling in a fibre is reflected back by the process known as Rayleigh Backscatter.

Vibrations from the surrounding environment, will disturb the light in the fibre and will therefore be observed by the DAS interrogator. As the data is processed in real time, advanced algorithms can recognise the unique signatures of each type of event. The events that are of concern are reported to the alarm server.

 

Helios DAS  Helios Theta  Panoptes  EDAM

Perimeter Security
Perimeter Security

Threat Location

The system can then show an operator the precise location of the threat, provide information about what event has taken place and give the operator the opportunity to make a timely and proportionate response.

Fotech’s DAS system includes a highly configurable sensor, which means that the laser pulse frequency, pulse width and many other parameters can be controlled enabling the system to be tuned to each customer’s specific requirements.

The simplest way to think about this technology is to imagine a series of thousands of microphones distributed along the length of your asset, every microphone is monitored, and we can track multiple events simultaneously.

Other Technology Products

Helios®  DAS

Helios® DAS

Fotech's Helios DAS technology taps into fibre optic cables running along infrastructure and assets for uninterrupted feedback on activities as they happen. 

Helios DAS
Helios® Theta

Helios® Theta

Helios Theta harnesses cutting-edge photonics and advanced artificial intelligence to provide high resolution imaging and data acquisition continuously along the length of your fibre.

Helios Theta
Panoptes

Panoptes

Using advanced AI technology, Panoptes differentiates between background noises and real threats to ensure that you have the information you need to respond effectively.

Panoptes
EDAM

EDAM

Enhanced Data and Acoustic Management (EDAM) is an advanced processing solution which may be added to Helios® DAS and Panoptes® for deeper acoustic insights.

EDAM