Investigation of fibre-optic cable formation in DAS acquisition

Heather K. Hardeman-Vooys, Michael P. Lamoureux

In this paper, we provide insight into the amplitude response of a distributed acoustic sensor. Using techniques from algebraic topology, we know that there is a mathematical foundation for deforming a helically wound fibre into a straight fibre for a DAS system. We model what occurs as a helically wound fibre deforms into a straight fibre optic cable. The deformation allows us to consider how the strain tensor is affected by studying its determinant, trace, and eigenvalues.