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1、上海交通大学硕士学位论文光纤光栅传感和调谐技术研究姓名:文瑜申请学位级别:硕士专业:电磁场与微波技术指导教师:陈建平20070101上海交通大学硕士论文的作用,还提高了光栅的波长调谐范围,同时光栅的温度灵敏度和应变灵敏度也有很大的提高。2.由光纤Bragg光栅波长带宽调谐原理出发,利用材料力学理论,得出了根据光纤Bragg光栅粘贴在简支梁和圆环梁上位置的不同,可以实现无啁啾调谐和中心波长不变的啁啾带宽线性调谐。与其他的调谐方法相比,使用圆环梁调谐的最大优点是不需改变梁的受力方式,而只需转动圆环梁即可分别实现无啁啾的中心波长
2、调谐和无中心波长偏移的啁啾带宽调谐。基于这种圆环梁调谐结构可以制作可调谐啁啾光纤光栅和温度不敏感的光纤光栅位移传感器。3.对辐射交联聚乙烯封装的光纤Bragg光栅传感器,将其应用到建筑工程实验中的新吹填区桩基负摩擦性状测量,进行应变测量,并与裸光纤Bragg光栅传感器以及传统的电阻应变片测量结果进行了对比。从而原理性地模拟分析了光纤Bragg光栅传感器在实际工程中的应用效果。关键词:光纤Bragg光栅,应变传感,温度传感,增敏,波长调谐,带宽调谐III上海交通大学硕士论文ResearchofFiberGratingSens
3、ingandTuningTechnologyAbstractWiththeimprovementoffiberBragggrating(FBG)fabricationtechnologyandincreasingapplications,fibergratingisoneofthemostpromisingandrepresentativepassiveopticalfiberdevices.SincethefirstFBGwaswrittenintoaGe-dopedfiberbythemethodofstanding-
4、wavein1978,sensorsbasedontheFBGreceivedmoreandmoreattentionfortheadvantagessuchasgoodreliability,interferencefreetoelectromagneticfields,lightinweight,anticorrosion,abilitytoworkinthemal-condition,high-reconverability,distributedsensingandsoon.Itwidensapplicationf
5、ieldoffibertechnologyinmanydifferentfieldsincludingcivilstructure,aerospacetechnology,shipandmarine,oilandchemicalindustry,electricandnuclearpowerindustry,andmedicine.Thedissertationiscomposedoftwoparts:thefirstpart(Chapter1to2)introducesthetheoryandimplementation
6、techniqueofFBG,asapreliminaryfoundationfortheoreticalandexperimentalstudyinwhatfollows.Thesecondpart(Chapter3to5)isthemainpartofthedissertation,whichincludesthefollowingcontents.1.Thecoreoffibergratingisthinandbrittle.ItpresentslowIV上海交通大学硕士论文shearingstrengthsotha
7、titmustbeencapsulatedinthepracticalapplications.Packagingtechniquesincludeprotectingpackagingandsensitivity-enhancingpackaging.BasedontheanalysisofstrainandtemperaturesensingpropertiesofFBG,radiationcrosslinkingpolyethylenematerialisemployedforpackagingtoenhancese
8、nsitivityofFBG.Relatedtechniqueisdeveloped.ItnotonlyprotectsFBG,butalsoenhancesthewavelengthtuningrangeandthesensitivityoftemperatureandstraingreatly.2.