Measuring the shape of microbends in optical fibers
Measuring the shape of microbends in optical fibers
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DOI：
10.1364/ol.392366
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发表时间：
2020-09-15
期刊：
影响因子：
3.6
通讯作者：
Westbrook, Paul S.
中科院分区：
文献类型：
--
作者：
Ahmad, Raja;Ko, Wing;Westbrook, Paul S.
我们报告了沿光纤长度产生的小变形的分布式形状测量。该光纤包含多个波导芯，每个波导芯都刻有弱连续布拉格光栅。从光学反向散射反射计获得的纤芯的分布式布拉格反射率数据用于估计光纤的局部曲率和位置。我们成功地演示了周期性微变形的传感——幅度大约为 1 μm 或更小，长度为几百 pm。众所周知，此类微弯曲会导致光纤衰减，本文提出的方法可以在从电信电缆设计到生物技术、机器人、制造、航空航天和安全等应用中对这些微弯曲进行详细测量。 (C) 2020 年美国光学学会
We report on the distributed shape measurement of small deformations produced along the length of an optical fiber. The fiber contains multiple waveguiding cores, each inscribed with weak continuous Bragg gratings. The distributed Bragg-reflectivity data for the fiber cores, obtained from the optical backscatter reflectometry, are used to estimate the local curvature and the position of the fiber. We successfully demonstrate the sensing of periodic microdeformations-approximately 1 mu m or less in amplitude and a few hundred p.m in length. Such microbends are known to cause attenuation in optical fibers, and the approach presented here can enable a detailed measurement of these microbends in applications ranging from telecommunications cable design to biotechnology, robotics, manufacturing, aerospace, and security. (C) 2020 Optical Society of America