Helios Distributed Acoustic Sensor

The Helios system from Fotech consists of two elements: an optical fibre cable, and the Helios Interrogator which is connected to one end of the fibre and sends a pulsed laser into the fibre, and analyses the reflected signals.

The Helios interrogator combines the high sensitivity of optical fibre interferometers with the high spatial resolution of short pulse optical time domain reflectometry in single-mode optical fibre.