Distributed Optical-Fibre Acoustic Sensor: Past, Present, and Future

Ali Masoudi*1, Gilberto Brambilla1

1Optoelectronics Research Centre, University of Southampton, Southampton, UK. (A.Masoudi@soton.ac.uk)

Distributed Optical-fibre Acoustic Sensing is a rapidly evolving technology with an unparalleled capability of measuring ground motion at regular intervals over tens of kilometers of optical fibre. In this presentation, the principle of distributed acoustic sensor (DAS) systems will be presented and the relationship between the sensing range, frequency span, strain sensitivity, and frequency resolution will be discussed. Different techniques used in DAS technology to extract the strain information will be presented. The origin and current state of the technology will be reviewed. Finally, the future of this technology and its potential will be assessed.