Kissinger, ThomasChehura, EdmonJames, Stephen W.Tatam, Ralph P.2017-06-152017-06-152017-04-23Thomas Kissinger, Edmon Chehura, Stephen W. James, Ralph P. Tatam. Multiplexing curvature sensors using fibre segment interferometry for lateral vibration measurements. 25th International Conference on Optical Fiber Sensors, 24-28 April 2017, Jeju, Republic of Korea0277-786Xhttp://dx.doi.org/10.1117/12.2264781https://dspace.lib.cranfield.ac.uk/handle/1826/12033Dynamic fibre-optic curvature sensing is demonstrated by interrogating chains of fibre segments, separated by broadband Bragg grating reflectors, using range-resolved interferometry (RRI). Four fibre strings, containing four fibre segments each of gauge length 20 cm, are attached to the opposing sides of a support structure and the resulting differential strain measurements allow inference of lateral displacements of a cantilever test object. Dynamic tip displacement resolutions in the micrometre range at an interferometric bandwidth of 21 kHz demonstrate the suitability of this approach for highly sensitive and cost-effective fibre-optic directional vibration measurements of smart structures. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use onlyen©2017. SPIE. Please refer to any applicable publisher terms of use.Conference paper