Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres
Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres
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DOI：
10.1016/j.optlaseng.2022.107047
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发表时间：
2022
影响因子：
4.6
通讯作者：
O. Arrizabalaga;Q. Sun;Timothy Lee;J. Zubía;Javier Velasco Pascual;I. Ocáriz;A. Schülzgen;R. Amezcua-correa;G. Brambilla;M. Beresna
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文献类型：
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作者：
O. Arrizabalaga;Q. Sun;Timothy Lee;J. Zubía;Javier Velasco Pascual;I. Ocáriz;A. Schülzgen;R. Amezcua-correa;G. Brambilla;M. Beresna
提出了一种基于耦合多芯光纤的光学测量仪并进行了实验证明。通过使用直接激光写入选择性地打破光纤折射率分布对称性，引入纤芯之间的非对称模式耦合。这样就可以制造出能够仅使用单个传感器来检测和区分结构中不同类型变形的光学测量仪。将制造的光学测量仪与校准的商业测量仪和光纤布拉格光栅作为应变、振动和曲率测量仪进行比较。测试表明，这种新型光学测量仪的性能优于市售传感器，并且具有最高的灵敏度。所提出的技术可能是制造新型光纤传感设备的关键，该设备比以前具有更多的功能和更好的特性。
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.