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时间:2020-03-06
《一种Sagnac干涉仪结构的光子晶体光纤温度传感器_伍铁生.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39卷第11期中国激光Vol.39,No.112012年11月CHINESEJOURNALOFLASERSNovember,2012一种Sagnac干涉仪结构的光子晶体光纤温度传感器伍铁生1,211211王丽王哲刘玉敏胡署阳尹丽丹1北京工业大学应用数理学院,北京100124(2北京邮电大学信息光子学与光通信国家重点实验室,北京100876)摘要采用Sagnac干涉仪结构,设计了一种高双折射光子晶体光纤环镜温度传感器。光子晶体光纤温度稳定性好,通过向高双折射光子晶体光纤空气孔填充热光系数高的液体材料乙醇,从而实现温度传感的目的。采用平面波展开法,分析了高双折射光子晶体
2、光纤的双折射与传输波长和温度的关系。理论分析表明,填充乙醇后,高双折射光子晶体光纤的双折射随着传输波长和温度的增加而增加,且双折射与温度成线性关系。实验中将一段填充乙醇的高双折射光子晶体光纤与3dB耦合器熔接制作成Sagnac干涉仪结构的光纤环镜,当温度从45℃升至80℃时,光谱仪上观察到凹点λi向短波方向漂移了309.280nm,温度灵敏度高达8.837nm/℃。关键词传感器;光子晶体光纤;平面波展开法;双折射;光纤温度传感器中图分类号TN25文献标识码Adoi:10.3788/CJL201239.1114002APhotonicCrystalFiberTemper
3、atureSensorBasedonSagnacInterferometerStructure1,211211WuTieshengWangLiWangZheLiuYuminHuShuyangYinLidan1CollegeofAppliedSciences,BeijingUniversityofTechnology,Beijing100124,China烄烌2StateKeyLaboratoryofInformationPhotonicsandOpticalCommunications,BeijingUniversityof烆PostsandTelecommunica
4、tions,Beijing100876,China烎AbstractAhighlybirefringentphotoniccrystalfiberloopmirrortemperaturesensorbasedonSagnacinterferometerstructureisdesigned.Asthephotoniccrystalfiberhasgoodtemperaturestability,inordertoachievethetemperaturesensing,ethanolwhichhasahighthermalcoefficientisfilledint
5、otheairholesofthehighbirefringencephotoniccrystalfiber.Usingplanewaveexpansionmethod,therelationshipbetweenbirefringenceofthehighlybirefringentphotoniccrystalfiberandtransmissionwavelength,andthatbetweenbirefringenceandtemperatureareanalyzed.Theoreticalanalysisshowsthat:filledwithethano
6、l,thebirefringenceofhighbirefringencephotoniccrystalfiberincreaseswiththeincreaseofthetransmissionwavelengthandtemperature,besides,thereisalinearrelationshipbetweenbirefringenceandtemperature.Intheexperiment,apieceofhighbirefringencephotoniccrystalfiberfilledwithethanolisweldedwitha3dBc
7、ouplertoformafiberloopmirror.Whenthetemperaturerisesfrom45℃to80℃,theconcavepointdriftof309.280nmtowardstheshortwavelengthisobservedonspectrumanalyzer.Thesensitivityisashighas8.837nm/℃.Keywordssensors;photoniccrystalfiber;planewaveexpansionmethod;birefringence;fibertemperaturese
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