Fiber-optic bend sensor using LP21 mode operation
Fiber-optic bend sensor using LP21 mode operation
复制标题
使用 LP21 模式操作的光纤弯曲传感器
DOI：
10.1364/oe.20.026127
复制
发表时间：
2012-11-19
期刊：
影响因子：
3.8
通讯作者：
Wu, X.
中科院分区：
文献类型：
--
作者：
Fan, Yuqiang;Wu, George;Wu, X.
提出了一种基于LP 21模传播的新型光纤弯曲传感器。该传感器，包括一个S-弯曲的弹性薄膜上的光纤，测量LP 21模式散斑图旋转，这与弯曲角度线性增加的应力光效应。该传感器的实验灵敏度可达4.13 rad/m（-1）。结合光纤耦合模理论和弹光理论对传感器进行了理论分析，验证了传感器的准确性。该传感器也被证明是温度免疫，并可以检测弯曲方向和弯曲角度具有很大的动态范围。此外，传感器的实现采用了650 nm的廉价单模光纤，用于少模操作，实现了低损耗传输并与现有接口兼容。(c)2012美国光学学会
A novel fiber-optic bending sensor based upon the propagation of LP21 mode is demonstrated. The sensor, comprised of an S-bend fiber on an elastic film, measures LP21 mode specklegram rotation, which increments linearly with bending angle by the stress-optic effect. The sensor is capable of experimentally achieving a sensitivity as high as 4.13 rad/m(-1). The theoretical analysis of the sensor, which is a combination of fiber coupled-mode theory and elastic-optic theory, validates the accuracy of the sensor. The sensor is also shown to be temperature-immune, and can detect both bending direction and bending angle with a large dynamic range. Furthermore, the sensor implementation incorporates inexpensive single-mode fiber at 650 nm for few-mode operation, enabling low-loss transmission and compatibility with existing interfaces. (c) 2012 Optical Society of America