干涉型微纳光纤传感器研究

《干涉型微纳光纤传感器研究》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、暨南大学硕士学位论文characteristicoftheproposedinterferometerareinvestigatedwhiletheinterferencespectrumiscalculated.Thesensitivitytoexternalrefractiveindexandtemperaturearemeasuredas2225.2nm/RIUand11.7pm/°C,respectively.Thesensitivitytoexternalrefractiveindexismuchhigherthanth

2、epreviouslyreportedinterferometersbasedoncascadedlongperiodgratingsinSMFs.AfurtherinvestigationonhowtoenhancetheRIsensitivityforthedetectionofslightcomponentialchangeofthesurroundingmediumisalsocarriedout.Thelowtemperaturesensitivitygreatlyreducestheeffectofcross-sens

3、itivityintherefractiveindexmeasurement.Thetotallengthofthepresentdeviceisonly8.84mmshowingexcellentcompactness.(3)Micro-taperinterferometerisproposedforthemeasurementofrelativehumidity.Theenergyoffundamentalmodecouplestohigherordermodes(mainlyHE12mode)overthetransitio

4、nregionwhichcanactasabeamsplitter/combiner.TheinterferometricfringescanbeobservedasaresultofthephasedifferencebetweentheHE11andHE12modes.Thesensitivityofproposedinterferometertoexternalrelativehumidityandtemperaturearemeasuredas97.4pm/%RHand-4.74pm/°C,respectively.The

5、lowtemperaturesensitivitygreatlyreducestheeffectofcross-sensitivityintherelativehumiditymeasurement.Thesensorpresentsaresponsetimelessthan188ms,muchfasterthanthecoatedsensors.Keywords:Fiberopticsensors;Microfibers;Interferometer;Refractiveindexsensor;Humiditysensor.II

6、I暨南大学硕士学位论文目录摘要..................................................................................................................................................................IABSTRACT..................................................................................

7、.....................................................................II目录................................................................................................................................................................IV第一章绪论............................

8、............................................................................................................................