Abstract:
Areflectiontypepolarizationmaintainopticalfibertemperaturesensorwasdesigned.The
operationprinciplewasintroducedandthesensingequationwasgiven.Analysisindicatedthatthe
propagationlossvarietywasthemainfactorwhichmadesensingequationparameterschange.So,inthe
applicationfieldwheretheopticalpathstructureofsensormightbere-assembled,theparameters
calibrationwasnecessary.Basedonthecharacteristicandtherelationofsensoropticalsectionoutput
signalandthesensingequationparameters,thepropagationlosscouldbeseparatedfromthesensor
initializationparametersandasimpleandpracticalfieldcalibrationmethod,withwhichthewholesensing
equationparameterscouldbecalibratedwhenthetemperatureatthesensorprobewasgiven,was
proposedandthecalculationequationwasestablished.Anexperimentalsensorsystemwasbuiltandthe
calibrationexperimentsweremadebychangingthepropagationloss.Thedateobtainedwereanalyzed
andcomparedwithpolynomialfittingandmodelcalculation.Theresultprovesthefieldcalibration
technologyandthesensingtemperatureprecisioncanbebetterthanupanddown0.5℃beforeandaftercalibration.