融锥多芯光纤弯曲传感器  

Bending Sensor Based on Tapered Multicore Fiber

作　　者：朱晓亮[1,2,3] 虞瑶 张晓东 陈吟啸[1] 项飞 潘寒洁 宋鑫本 毕晓彬 Zhu Xiaoliang;Yu Yao;Zhang Xiaodong;Chen Yinxiao;Xiang Fei;Pan Hanjie;Song Xinben;Bi Xiaobin(College of Information and Electronic Engineering(Sussex Artificial Intelligence Institute),Zhejiang Gongshang University,Hangzhou 310018,Zhejiang,China;Futong Group Co.,Ltd.,Hangzhou 311400,Zhejiang,China;College of Optical Science and Engineering,Zhejiang University,Hangzhou 310058,Zhejiang,China;College of Mechanical and Electrical,Hangzhou Polytechnic,Hangzhou 311402,Zhejiang,China)

机构地区：[1]浙江工商大学信息与电子工程学院(萨塞克斯人工智能学院),浙江杭州310018 [2]富通集团有限公司,浙江杭州311400 [3]浙江大学光电科学与工程学院,浙江杭州310058 [4]杭州科技职业技术学院机电学院,浙江杭州311402

出　　处：《激光与光电子学进展》2023年第7期350-353,共4页Laser & Optoelectronics Progress

基　　金：浙江省自然科学基金基础公益研究计划(LGG20E040001);杭州科技职业技术学院校课题(HKZYYB-2018-1)。

摘　　要：利用光纤熔融拉锥技术,对一种中心对称、具有较大芯间距的多芯光纤进行了优化。融锥后的光纤具有倏逝场强、传感灵敏度高的特点,但由于其柔韧性差难于用作弯曲传感测量。本文设计了一种柔性传感器,使优化后的融锥光纤可用于弯曲传感测量。利用超模耦合理论对优化后多芯光纤传感器的透射谱进行了分析,并对其弯曲传感特性进行了实验研究。实验结果表明,该柔性融锥光纤传感器的干涉条纹与弯曲曲率有很好的线性关系。优化后的融锥光纤弯曲传感器的灵敏度为2.90 nm/m^(−1)。A fiber tapering technique is used to optimize a central symmetry multicore fiber that has a large core spacing.The tapered fiber has the characteristics of a strong evanescent field and high sensing sensitivity;however,it is difficult to use as a bending sensor because of its poor flexibility.This paper proposes a flexible structure design so that the optimized tapered fiber can be used as a bending sensor.The transmission spectrum of the optimized multicore optical fiber sensor is analyzed using supermode coupling theory.In addition,the bending sensing characteristics of the sensor are experimentally studied.The experimental results indicate that there is a good linear relationship between the interference fringes and bending curvature.The sensitivity of the optimized tapered fiber sensor is 2.90 nm/m^(−1).

关 键 词：遥感与传感器 光纤传感器 多芯光纤 弯曲传感器 超模 柔性结构 

分 类 号：O436[机械工程—光学工程]