NOVA technology is based on Fibre Segment Interferometry (FSI)
Partially reflecting elements are integrated into the sensing fibres. The distance between two consecutive reflective elements is a segment. The segment length L (from 10 mm to tens of meters) defines the spatial resolution.
Strain (∆L) or a temperature difference (ΔT) applied to a segment induces a phase change to the light carrier signal for each reflector. From the measurable phase change, it is possible to quantify the deformation.