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具有温度自补偿的级联光栅传感特性研究.docx

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具有温度自补偿的级联光栅传感特性研究 Title:StudyonTemperatureSelf-compensationCharacteristicsofCascadedFiberGratingSensors Abstract: Fibergratingsensorshavegainedsignificantattentioninvariousapplicationsduetotheirnumerousadvantages,suchashighsensitivity,compactness,reliability,andimmunitytoelectromagneticinterference.However,theaccuracyandreliabilityofthesesensorscanbeaffectedbyenvironmentalfactors,especiallytemperaturefluctuations.Toaddressthisissue,thispaperfocusesontheresearchandinvestigationoftemperatureself-compensationcharacteristicsincascadedfibergratingsensors. 1.Introduction Temperatureisacriticalparameterthatneedstobemeasuredandmonitoredinmanyindustrialprocessesandapplications.Traditionaltemperaturesensorsoftensufferfromlimitationssuchasslowresponse,lowaccuracy,andvulnerabilitytoelectromagneticinterference.Fibergratingsensors,ontheotherhand,haveshowngreatpotentialfortemperaturesensingduetotheirexcellentqualities.Thecascadedfibergratingsensor,particularly,offersuniqueadvantagesfortemperaturemeasurementoverotherconfigurations. 2.PrincipleofCascadedFiberGratingSensors Cascadedfibergratingsensorsconsistoftwoormorefibergratingsinseries,eachwithdifferentgratingperiods.Whenlightpassesthroughthesefibergratings,auniquetransmissionspectrumisgenerated.Changesintemperatureresultinashiftinthetransmissionspectrum,enablingtemperaturemeasurementbasedonthewavelengthshift. 3.Temperature-inducedErrorinFiberGratingSensors Fibergratingsarepronetoerrorscausedbytemperaturevariationsbecausethethermalexpansionofthefiberandthebirefringencechangeduetostrain.Theseeffectscanleadtosignificantmeasurementerrorsifnotproperlycompensated.Therefore,itiscrucialtodevelopself-compensationmechanismstominimizetheimpactoftemperatureontheaccuracyoffibergratingsensors. 4.TemperatureSelf-compensationTechniques Severaltechniqueshavebeenproposedtomitigatethetemperature-inducederrorinfibergratingsensors.Thesetechniquesincludetheuseofdifferentmaterialswithdifferentcoefficientsofthermalexpansion,employingfiberloopmirrors,a