干涉型微纳光纤传感器-研究

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

2、erthanthepreviouslyreportedinterferometersbasedoncascadedlongperiodgratingsinSMFs.AfurtherinvestigationonhowtoenhancetheRIsensitivityforthedetectionofslightcomponentialchangeofthesurroundingmediumisalsocarriedout.Thelowtemperaturesensitivitygreatlyreducestheef

3、fectofcross-sensitivityintherefractiveindexmeasurement.Thetotallengthofthepresentdeviceisonly8.84mmshowingexcellentcompactness.(3)Micro-taperinterferometerisproposedforthemeasurementofrelativehumidity.Theenergyoffundamentalmodecouplestohigherordermodes(mainlyH

4、E12mode)overthetransitionregionwhichcanactasabeamsplitter/combiner.TheinterferometricfringescanbeobservedasaresultofthephasedifferencebetweentheHE11andHE12modes.Thesensitivityofproposedinterferometertoexternalrelativehumidityandtemperaturearemeasuredas97.4pm/%

5、RHand-4.74pm/°C,respectively.Thelowtemperaturesensitivitygreatlyreducestheeffectofcross-sensitivityintherelativehumiditymeasurement.Thesensorpresentsaresponsetimelessthan188ms,muchfasterthanthecoatedsensors.Keywords:Fiberopticsensors;Microfibers;Interferometer

6、;Refractiveindexsensor;Humiditysensor.III暨南大学硕士学位论文目录摘要..................................................................................................................................................................IABSTRACT..................................

7、.....................................................................................................................II目录...........................................................................................................................................

8、.....................IV第一章绪论........................................................................................................................................................