Fibre optic sensing arrays are beginning to see deployment in the oil and gas exploration industry, smart structures, naval submarine surveillance and other defence and security systems. Each fibre optic device acts as a listening element for seismic, mechanical or acoustic signals. With appropriate signal processing, a three-dimensional seismic or acoustic image over a large area can be constructed.
This project will continue the ongoing experimental research at the ANU to develop arrays for remote sensing at distances over 100 km. We aim to improve the sensitivity and cost-effectiveness of such sensing arrays using digital interferometry (DI). We will capitalise on DI's ability to simultaneously measure multiple elements with a single laser and a single detector to develop new array architectures and techniques.