Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres
multicore fibre-based sensors
multiparameter sensor
0103 physical sciences
optical fibre-based sensors
mode coupling effect
optical gauges
530
01 natural sciences
620
DOI:
10.1016/j.optlaseng.2022.107047
Publication Date:
2022-03-22T17:11:26Z
AUTHORS (10)
ABSTRACT
An optical gauge based on coupled multi-core fiber is proposed and experimentally demonstrated. By using direct laser writing to selectively break the fiber index profile symmetry, asymmetric mode coupling between cores is introduced. This allows to fabricate optical gauges with the ability to detect and differentiate different types of deformation in structures using just a single sensor. The fabricated optical gauges are compared with calibrated commercial gauges and fiber Bragg gratings as strain, vibration and curvature gauge. The tests indicate superior performance of this novel optical gauge over the commercially available sensors and offer the highest sensitivities. The proposed technology could be key to the fabrication of new fiber-based sensing devices with more capabilities and better features than previously achieved.<br/>This work has been funded in part by the Fondo Europeo de Desarrollo Regional (FEDER) , in part by the Ministerio de Ciencia, Innovacion y Universidades under projects RTI2018-094669-B-C31 in part by the GobiernoVasco/Eusko Jaurlaritza ELKARTEK KK-2021/00092 and ELKARTEK KK-2021/00082. The authors also acknowledge UKRI for partial support through research grants EP/S013776/1; NE/S012877/1; NE/T005890/1<br/>
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