Coherent Fiber Optic Sensors for Impact Feature Assessment in Glass Fiber Reinforced Plastic (GFRP)

Applicability of an interferometric optical fibre sensor for shallow landslide monitoring – Experimental tests

“…This limitation can, however, be overcome by adding a multiplexing functionality to the interferometric interrogator so that tens of sensing fibres sections could be exploited to cover the entire area of interest. Alternatively, two integral interferometric sensors can be exploited in a counter-propagating scheme allowing for event localization as recently demonstrated by (Di Luch et al, 2019). In a follow-up work, a novel interrogation technique named Brillouin Optical Correlation Domain Analysis (BOCDA) (Morosi et al, 2017) will be exploited that can recover the entire strain profile along the deployed sensing fibre with centimetric-spatial resolution.…”

“…Those sensors are said to be a worthy competitor to what is already established and commercially available instruments. Applications of this optical fibre sensing technology have demonstrated its efficiency in a variety of engineering fields and at different scalesfrom pipeline cavitation (Boffi et al, 2019) to structural health monitoring (SHM) (Di Luch et al, 2019). The application of this technology to slope stability monitoring could be an advancement with respect to current optical fibre monitoring technologies due to the potential of coherent optical fibre sensors to provide high sensitivity measurements at a reduced cost.…”