文章编号:1002-2082(2023)01-0226-08螺旋形塑料光纤表面等离子体共振折射率传感器徐跃1,3,4,薛鹏2,3,4,张瑞1,3,4,陈媛媛1,4(1.中北大学信息与通信工程学院,山西太原030051;2.中北大学电气与控制工程学院,山西太原030051;3.中北大学前沿交叉科学研究院,山西太原030051;4.山西省光电信息与仪器工程技术研究中心,山西太原030051)摘要:研究了基于波长调制的螺旋形塑料光纤(plasticopticalfiber,POF)表面等离子体共振(surfaceplasmonresonance,SPR)折射率传感器。采用机械热压和扭曲法将塑料光纤制备成螺旋形,在螺旋形POF上通过磁控溅射蒸镀一定厚度(约50nm)的金属薄膜来激励SPR效应,从而形成螺旋形POF-SPR传感器。通过对螺旋形POF-SPR传感器的结构进行修饰,研究不同结构参数对折射率传感特性的影响。实验结果表明:由厚度为500μm扁平形POF扭制、螺纹数为4的螺旋形POF-SPR传感器具有较好的线性度和折射率传感特性,在折射率为1.335~1.400范围内测得的灵敏度为1262nm/RIU。该传感器具有成本较低、制备简单、结构稳定等优点。关键词:塑料光纤;螺旋形;折射率传感;表面等离子体共振中图分类号:TN253;O433.4文献标志码:ADOI:10.5768/JAO202344.0108002Plasmonresonancerefractiveindexsensorofspiral-shapedplasticopticalfibersurfaceXUYue1,3,4,XUEPeng2,3,4,ZHANGRui1,3,4,CHENYuanyuan1,4(1.SchoolofInformationandCommunicationEngineering,NorthUniversityofChina,Taiyuan030051,China;2.SchoolofElectricalandControlEngineering,NorthUniversityofChina,Taiyuan030051,China;3.InstituteofFrontierandInterdisciplinaryScience,NorthUniversityofChina,Taiyuan030051,China;4.ShanxiProvinceOptoelectronicInformationandInstrumentEngineeringTechnologyResearchCenter,Taiyuan030051,China)Abstract:Aspiral-shapedplasticopticalfiber(POF)surfaceplasmonresonance(SPR)refractiveindexsensorbasedonwavelengthmodulationwasstudied.First,theplasticopticalfiberwaspreparedintoaspiralbymechanicalhotpressinganddeformingmethod,andthenametalfilmwithacertainthickness(about50nm)wasdepositedonthespiral-shapedPOFbymagnetronsputteringtostimulatetheSPReffect,therebyformingaspiral-shapedPOF-SPRsensor.Bymodifyingthestructureofthespiral-shapedPOF-SPRsensor,theeffectsofdifferentstructur...