基于偏芯光纤的可方向识别光纤干涉曲率传感器  

Directional recognition fiber-optic interferometric curvature sensor based on eccentric core fiber

作　　者：魏勇 杨明慧 WEI Yong;YANG Minghui(College of Electronic&Information Engineering,Chongqing Three Gorges University,Chongqing 404100,China)

机构地区：[1]重庆三峡学院电子与信息工程学院,重庆404100

出　　处：《传感器与微系统》2025年第4期105-109,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(61705025);重庆市教育厅附属科技项目(KJZD-M202201201);重庆市自然科学基金资助项目(CSTB2023NSCQ-MSX0020);重庆市人才工程(cstc2024ycjh-bgzxm0227,cstc2024ycjh-bgzxm0057);重庆三峡医学院项目(XJ2023000704);重庆三峡学院基本科研业务费专项资金资助项目(19ZDPY08);浙江树仁大学基础科学研究专项资金资助项目。

摘　　要：针对现有的可方向识别光纤干涉曲率传感器通常基于复杂微加工制成,存在制备重复性低等问题,提出基于偏芯光纤(ECF)的可方向识别光纤干涉曲率传感器,纤芯模式场能量分布在光纤的上半部分,包层模式场能量沿光纤轴对称分布,施加凹向和凸向弯曲时,纤芯分别处于光纤压缩和拉伸侧,干涉谷分别蓝移和红移,实现弯曲方向识别和传感。实验结果表明:该传感器在0~1.1 m^(-1)曲率检测范围内,凹向弯曲的灵敏度为-16.06 nm/m^(-1),凸向弯曲的灵敏度为17.51 nm/m^(-1)。本文提出的传感器机械强度高,制备重复性高,在可方向识别曲率检测领域中发挥重要作用。Aiming at the problem that current directional recognition fiber-optic interferometric curvature sensors are usually manufactured based on complex micro-machining,and exists low reproducibility,a directional recognition optical fiber interference curvature sensor based on biased core fiber is proposed,which the energy of the fiber core modal field is distributed in the upper part of the fiber,while the energy of the cladding modal field is distributed symmetrically along the fiber axis.When concave and convex bendings are applied to the sensor separately,the fiber core is on the compression and stretching side of the fiber,respectively.Consequently,the interference valley is blue-shifted and red-shifted,respectively,to realize the recognition and sensing of the bending direction.The experimental results demonstrate that the sensor has a sensitivity of-16.06 nm/m^(-1)for concave bending and 17.51 nm/m^(-1)for convex bending within a curvature detection range of 0~1.1 m^(-1).The proposed sensor has high mechanical strength and high production repeatability,it plays an important role in the field of orientation recognition curvature detection.

关 键 词：弯曲方向识别 模式场能量非轴对称分布 偏芯光纤 光纤干涉曲率传感 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN252[自动化与计算机技术—控制科学与工程]