Distributed Twist Sensing With Uncoupled Multi-Core Fibers Using Polarization-Sensitive Reflectometry

被引:1
|
作者
Aitkulov, Arman [1 ]
Cappelletti, Martina [1 ]
Orsuti, Daniele [1 ]
Schenato, Luca [1 ]
Hayashi, Tetsuya [2 ]
Santagiustina, Marco [1 ,3 ]
Galtarossa, Andrea [1 ,3 ]
Palmieri, Luca [1 ,3 ]
机构
[1] Univ Padua, Dept Informat Engn, I-35131 Padua, Italy
[2] Sumitomo Elect Ind Ltd, Yokohama 2448588, Japan
[3] Natl Inter Univ Consortium Telecommun CNIT, I-43124 Parma, Italy
关键词
Birefringence; distributed sensors; polarization-based distributed sensors; sensing; spin; twist; uncoupled multi-core fiber; MODE-DISPERSION; BIREFRINGENCE; ROTATION;
D O I
10.1109/JLT.2024.3404098
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We explore the use of uncoupled multi-core fibers employed for telecommunications as a technological platform for implementing polarization-based distributed twist sensors. Through polarimetric-optical frequency domain reflectometry we assess the twist-induced birefringence along the cores of an uncoupled four-core fiber. By applying controlled twist, we show that the elasto-optic coefficient in each core is consistent with the value reported for single-mode fibers, and that the cores experience the same birefringence variations in response to the applied twist. Moreover, we leverage the distinctive birefringence properties of unspun uncoupled multi-core fibers to achieve long-range twist sensing, showing that the measured twist is in excellent agreement with the applied one even when the perturbed fiber location is 500-m away from the source. We achieve a remarkable accuracy of 4 degrees in measuring the angle by which the fiber is twisted, with a spatial resolution of 8 cm. These results support the potential of uncoupled multi-core fibers to realize twist sensors that are relevant for applications such as umbilical cable monitoring.
引用
收藏
页码:6585 / 6591
页数:7
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