新型传感光纤光传输与折射率敏感特性研究  

Study on Optical Transmission and Refractive Index Sensitivity Characteristics

作　　者：杨国华[1,2] 陶奕霏 许愿 丁超 解泉华[3] YANG Guohua;TAO Yifei;XU Yuan;DING Cao;XIE Quanhua(School of Internet of Things and Artificial Intelligence,Wuxi Vocational Institute of Commerce,Wuxi 214153,China;Jiangsu Wireless Sensing System Application Engineering Technology Research and Development Center,Wuxi 214153,China;Intelligent Fiber Sensing Technology of Chongqing Municipal Engineering Research Center of Institution of Higher Education,Chongqing Key Laboratory of Fiber Optic Sensor and Photodetector,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]无锡商业职业技术学院物联网与人工智能学院,江苏无锡214153 [2]江苏省无线传感系统应用工程技术研究开发中心,江苏无锡214153 [3]重庆理工大学智能光纤感知技术重庆市高校工程研究中心,重庆市光纤传感与光电检测重点实验室,重庆400054

出　　处：《压电与声光》2023年第6期823-827,共5页Piezoelectrics & Acoustooptics

基　　金：中国高校产学研创新基金-未来网络创新研究与应用项目(2021FNB02004);国家自然科学基金面上基金资助项目(52176178);重庆市教委科学技术研究重大基金资助项目(KJZD-M202201101);重庆市高校创新研究群体资助项目(CXQT21035);重庆市自然科学基金创新发展联合基金重点资助项目(CSTB2022NSCQ-LZX0059);江苏省职业教育教师教学创新团队“物联网应用技术”基金资助项目(JS202156)。

摘　　要：为了提高光纤倏逝波传感器的灵敏度,该文提出了一种新型结构传感光纤。传感光纤由传统塑料光纤+新型阶跃光纤(折射率由纤芯向包层阶跃增大)+传统塑料光纤级联而成。新型阶跃光纤为倏逝波传感器的敏感区,光纤纤芯由聚甲基丙烯酸甲酯构成,包层由聚砜与GeO_(2)混合物构成。利用几何光学分析了光纤光传输特性,实验测试了光纤光传输特性及其对外界折射率敏感特性。结果表明,当新型阶跃光纤包层中GeO_(2)掺杂质量分数为1.5%,涂覆层厚为200μm时,传感光纤具有较好的光谱传输质量及高的折射率响应灵敏度。To increase the sensitivity of fiber-optic evanescent wave sensors,a sensing optic fiber with novel structure was proposed in this paper.The sensing optical fiber was by fabricated by cascading of a traditional plastic optical fiber,a novel step optical fiber(with a refractive index increasing step from the fiber core to the cladding)and another traditional plastic optical fiber together.The new step optical fiber was the sensitive area of the evanescent wave sensor.The fiber core was made of polymethyl methacrylate,and the cladding was made of a mixture of polysulfone and GeO_(2).The optical transmission characteristics of the prepared optical fiber were analyzed by using geometrical optics.The optical transmission characteristics and its sensitivity of the prepared optical fiber to the external refractive index were investigated.The results highlight that when the GeO_(2)doping content in the cladding of the new step optical fiber was 1.5 wt%and the coating thickness was^(2)00μm,the sensing fiber showed good spectral transmission quality and high refractive index response sensitivity.

关 键 词：传感光纤 倏逝波 光传输 折射率 灵敏度 

分 类 号：TN29[电子电信—物理电子学] TH811[机械工程—仪器科学与技术]