激光与光电子学进展, 2019, 56 (8): 080601, 网络出版: 2019-07-26
基于SPS光纤结构的高灵敏度曲率传感器 下载: 2936次
High Sensitivity Curvature Sensor Based on SPS Fiber Structure
光纤光学 曲率测量 单模-保偏-单模结构 Sagnac干涉仪 fiber optics curvature measurement single mode-polarization maintaining-single mode s Sagnac interferometer
摘要
提出了一种基于单模-保偏-单模(SPS)结构的高灵敏度曲率光纤传感器,该传感器将保偏光纤(PMF)的两端熔接在两段单模光纤之间。研究了传感器的曲率传感性能,以及保偏光纤的长度对传感器曲率灵敏度的影响。结果表明,随着曲率的增大,传感器输出光谱出现明显红移现象;保偏光纤长度对传感器的曲率灵敏度有重要的影响,当保偏光纤长度为11 cm,曲率为0.43~1.37 m
-1时,获得最大灵敏度为59.849 nm/m
-1的传感器。与其他光纤结构的传感器相比,该传感器具有结构简单、易于制造、灵敏度高等优点,可用于结构健康监测传感领域。
Abstract
A high sensitivity optical fiber curvature sensor with a fiber structure is proposed based on single mode-polarization maintaining-single mode (SPS), which is fabricated by splicing a piece of polarization-maintaining fiber (PMF) between two sections of single mode fiber. The curvature sensing performance and the effect of the length of PMF on the curvature sensitivity of this sensor are studied in experiments. The results show that, the output spectrum of this sensor shows an obviously red-shift phenomenon with the increase of curvature. In addition, the length of PMF has a significance influence on the curvature sensitivity of this sensor. In the curvature range from 0.43 m
-1 to 1.37 m
-1, the maximum sensitivity can reach to 59.849 nm/m
-1 when the length of PMF is 11 cm. This sensor has advantages of simple structure, easy fabrication and high sensitivity compared with the other optical fiber sensors with an optical fiber structure, and it can be used in the field of the structural health monitoring.
陆杭林, 胡君辉. 基于SPS光纤结构的高灵敏度曲率传感器[J]. 激光与光电子学进展, 2019, 56(8): 080601. Hanglin Lu, Junhui Hu. High Sensitivity Curvature Sensor Based on SPS Fiber Structure[J]. Laser & Optoelectronics Progress, 2019, 56(8): 080601.