Boilard Tommy, Bilodeau Guillaume, Morency Steeve, Messaddeq Younès, Fortier Richard, Trépanier François, Bernier Martin
Opt Express. 2020 Dec 21;28(26):39387-39399. doi: 10.1364/OE.411363.
We report on the development of a novel hybrid glass-polymer multicore fiber integrating three 80 µm polyimide-coated silica fibers inside a 750 µm polycarbonate cladding. By inscribing an array of distributed FBGs along each segment of silica fiber prior to the hybrid fiber drawing, we demonstrate a curvature sensor with an unprecedented precision of 296 pm/m around 1550 nm, about 7 times more sensitive than sensors based on standard 125 µm multicore fibers. As predicted by theory, we show experimentally that the measured curvature is insensitive to temperature and strain. Also, a more precise equation to describe the curvature on a simple bending setup is presented. This new hybrid multicore fiber technology has the potential to be extended over several kilometers and can find high-end applications in 3D shape sensing and structural health monitoring.
我们报道了一种新型混合玻璃-聚合物多芯光纤的研制，该光纤在750μm的聚碳酸酯包层内集成了三根80μm的聚酰亚胺涂覆石英光纤。通过在混合光纤拉制之前沿着每段石英光纤刻写一系列分布式光纤布拉格光栅（FBG），我们展示了一种曲率传感器，在1550nm附近具有296pm/m的前所未有的精度，比基于标准125μm多芯光纤的传感器灵敏度高约7倍。正如理论预测的那样，我们通过实验表明，测量的曲率对温度和应变不敏感。此外，还给出了一个更精确的方程来描述简单弯曲装置上的曲率。这种新型混合多芯光纤技术有可能扩展到数公里，并可在三维形状传感和结构健康监测中找到高端应用。
