椭球状非本征法布里-珀罗光纤探针的传感特性  

Sensing properties of ellipsoidal extrinsic Fabry-Perot fiber probe

作　　者：李恭烨 石胜辉[1] 罗彬彬[1] 邹雪[1] 陈建[1] 赵明富[1] LI Gongye;SHI Shenghui;LUO Binbin;ZOU Xue;CHEN Jian;ZHAO Mingfu(Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学光纤传感与光电检测重庆市重点实验室,重庆400054

出　　处：《光学精密工程》2024年第24期3545-3553,共9页Optics and Precision Engineering

基　　金：重庆市自然科学基金创新发展联合基金(No.CSTB2023NSCQ-LZX0008);重庆英才青年拔尖人才计划(No.CSTC2021YCJH-BGZXM0128);重庆市教育委员会科学技术研究项目(No.KJZDK202201106);重庆理工大大学创新团队(No.2023TDZ002);重庆理工大学研究生创新计划项目(No.gzlcx20243132)。

摘　　要：针对微型复杂环境下的物理参数检测,尤其是涉及折射率(Refractive Index,RI)和温度检测需满足的高灵敏度、低成本、抗电磁干扰等要求,本文提出一种制备简单、结构新颖的椭球状非本征型法布里-珀罗(Fabry-Perot,F-P)腔光纤探针传感器。首先将端面切平的单模光纤(Single Mode Fiber,SMF)插入陶瓷插芯,并在SMF端面依次固定UV胶和氧化石墨烯(Graphene Oxide,GO)构成端帽结构的椭球状双F-P腔光纤探针传感器。然后对该传感器的RI和温度特性进行了理论分析和实验研究。实验结果表明:在RI为1.3532~1.3912范围内,随着RI增加,该传感器的干涉光谱发生红移,RI灵敏度为119.1 nm/RIU,RI与波长偏移量的线性相关系数为0.99;在20~60℃范围内,传感器温度灵敏度为116 pm/℃。本文设计的探针传感器具有结构简单、抗干扰能力强、制作成本低、输出光谱稳定、检测区域小等优点。同时,GO独特的物理化学属性使其在抗原分子、细菌病毒等生物检测领域具有良好的应用前景。For the detection of physical parameters in miniature complex environments,especially involv⁃ing refractive index and temperature detection to meet the requirements of high sensitivity,low cost,antielectromagnetic interference,etc.In this paper,we proposed an ellipsoidal Fabry-Perot(F-P)cavity fiber optic probe sensor with simple preparation and novel structure.Firstly,a Single Mode Fiber(SMF)with a flat cut end face was inserted into a ceramic ferrule,and UV adhesive and Graphene Oxide(GO)were sequentially fixed on the end face of the SMF to form an ellipsoidal dual F-P cavity fiber probe sensor with an end cap structure.Then the refractive index(RI)and temperature characteristics of the sensor were the⁃oretically analyzed and experimentally investigated.The experimental results show that the interferometric spectrum of this sensor is red-shifted with the increase of RI in the range of 1.3532 to 1.3912,and the RI sensitivity is 119.1 nm/RIU,and the linear correlation coefficient between RI and wavelength shift is 0.99;in the range of 20~60℃,the temperature sensitivity of the sensor is 116 pm/℃.The probe sensor designed in this paper has the advantages of simple structure,strong anti-interference ability,low produc⁃tion cost,stable output spectrum and small detection area.Meanwhile,the unique physicochemical prop⁃erties of GO make it have good application prospects in the field of biological detection of various antigen molecules,bacteria and viruses.

关 键 词：光纤传感器 法布里-珀罗腔 氧化石墨烯 折射率 温度 

分 类 号：O436[机械工程—光学工程] TN253[理学—光学]