简介：Acompactammoniagassensorwithtwogaschambersisproposedinthispaper,whosecoresensingdeviceisaU-bendingmicroringresonator.Thewaveguidesofringpartandfeedbackpartinthisresonatoraremadeofsilicononinsulator(SOI)ridgewaveguidecoveredwithZnOnanocrystalswhicharesensitivetoammoniagas.Thesensorcanmeasuretwogroupsofgassamplessimultaneously.Bycomputersimulation,weobtaintheclearsensitivitycurvesoftwogaschambersinammoniasensorwhenthegasconcentrationincreasesfrom0to4‰.Thegasconcentrationsintwochamberscanbeobtainedfromoneoutputspectrum,whichsignificantlyreducesthematerialandtimeconsumption.
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