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时间:2020-04-24
《基于侧边抛磨光纤倏逝场的折射率传感特性-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第1O期光子学报Vo1.42No.102013年1O月ACTAPHOTONICASINICAOctober2013doi:10.3788/gzxb20134210.1182基于侧边抛磨光纤倏逝场的折射率传感特性白春河,罗云瀚,陈哲,陈小龙,徐梦云,唐洁媛(暨南大学理工学院光电_T程系光电信息与传感技术广东普通高校重点实验室,广州510632)摘要:为了优化基于侧边抛磨光纤器件的性能,采用在线抛磨和测量的方法,实验研究了抛磨区长度和抛磨区剩余包层厚度对侧边抛磨光纤折射率传感特性的影响.研究发现,侧边抛磨光纤对材料折射率的传
2、感特性依据灵敏度可以分为三个区域:1)折射率在1.300~1.450范围内,传感特性的灵敏度很低,但线性度很好;2)折射率在1.450~1.500范围内,具有灵敏的传感特性,但在这个范围内线性度较差;3)折射率液大于1.500以后,可以同时获得较好的灵敏度、线性度和稳定性.比较抛磨区长度分别为10mm和20mm的侧边抛磨光纤,20mm的抛磨区长度不会提高传感的灵敏度,却会增加器件的不稳定性.抛磨光纤剩余包层厚度对传感灵敏度和功率损耗有重要影响,可依据器件实际需要选择合适的剩余包层厚度.关键词:侧边抛磨光纤;折射率;灵敏度;剩余包
3、层厚度中图分类号:TN253;TP212.1文献标识码:A文章编号:1004—4213(2013)10—1182—5CharacteristicsofSide-polishedFiberinRefractiveIndexSensingBAIChun-he,LUOYun-han,CHENZhe,CHENXiao—long,XUMeng—yun,TANGJie—yuan(KeyLaboratoryofOptoelectronicInformationandSensingTechnologiesofGuangdongHigherEdu
4、cationInstitutes,DepartmentofOptoelectronicEngineering,CollegeofScienceandEngineering,JinanUniversity,Guangzhou510632,China)Abstract:Inordertooptimizetheperformanceofopticaldevicesfabricatedwithside—polishedfibers,onlinepolishingandmeasurementswereconductedtostudysen
5、singcharacteristicsofside—polishedfibereffectedbypolishinglengthandremainingcladdingthickness.Theresultsshowthat,thesensingcharacteristicsfortheside—polishedfiberusedherecanbedividedintothreeregionsaccordingtoitssensitivity.Inthefirstregionwithrefractiveindexrangingf
6、rom1.300to1.450,lOWsensitivityandhighlinearitywereachieved.Inthesecondregionwithrefractiveindexrangingfrom1.450to1。500,highsensitivitycanbeobtained,whileverylOWstability.Comparedtothefirsttworegions,bothrelativelygoodsensitivity,linearityandstabilitycanbespontaneousl
7、yachievedinthethirdregionwithrefractiveindexhigherthan1.50.Comparisonsoffiberswithpolishinglengthof10mmand20mmshowthattheincreaseofpolishinglengthdonotresultinimprovementofsensitivity,whilealossinstability.Theremainingcladdingthicknessplaysanimportantroleindeterminat
8、ingthesensitivityandtheinsertlOSSofside—polishedfiber,thereforeitshouldbeoptimizedtoachievethedesiredsensors.Keywords:Side—polished
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