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1、th36AnnualPreciseTimeandTimeInterval(PTTI)MeetingTHECHIP-SCALEATOMICCLOCK–LOW-POWERPHYSICSPACKAGER.Lutwak*,J.Deng,W.Riley?Symmetricom-TechnologyRealizationCenterM.Varghese,J.Leblanc,G.Tepolt,M.MescherCharlesStarkDraperLaboratoryD.K.Serkland,K.M.Geib,andG.M.Peake??SandiaNationalLabora
2、toriesAbstractWehaveundertakenadevelopmentefforttoproduceaprototypechip-scaleatomicclock(CSAC).Thedesigngoalsincludeshort-termstability,st<′-10t-1/2,y()6103withatotalpowerconsumptionoflessthan30mWandoveralldevicevolume<1cm.Thestringentpowerrequirementdominatesthephysicspackagearchite
3、cture,3necessarilydictatingasmall(<1mm)volumegaseousatomicensembleinterrogatedbyalow-powersemiconductorlaser.AtPTTI2002andPTTI2003,wereportedonlaboratoryexperimentsthatunderliethefundamentalarchitectureofourCSAC,basedoninterrogationofthecesiumD1transitionbythetechniqueofcoherentpopul
4、ationtrapping(CPT).Inthepastyear,thedevelopmentefforthasshiftedfromfundamentalresearchandfeasibilityinvestigationtoengineeringandprototypedevelopment.Inthispaper,wereportonthedesignofaruggedandcompactphysicspackagethatisexpectedtoexceedtheultimateperformanceandpowerrequirementsoftheC
5、SAC.INTRODUCTION3Wearedevelopingachip-scaleatomicclock(CSAC)withthegoalofproducinga1cmdevicethatcan-11provideastabilityof1×10over1hourwhileconsumingonly30mW.Whilethestabilitygoalsare*E-mail:RLutwak@Symmetricom.com?34TozerRd.,Beverly,MA01915??SandiaisamultiprogramlaboratoryoperatedbyS
6、andiaCorporation,aLockheedMartinCompany,fortheUnitedStatesDepartmentofEnergy’sNationalNuclearSecurityAdministrationundercontractDE-AC04-94AL85000.339FormApprovedReportDocumentationPageOMBNo.0704-0188Publicreportingburdenforthecollectionofinformationisestimatedtoaverage1hourperrespons
7、e,includingthetimeforreviewinginstructions,searchingexistingdatasources,gatheringandmaintainingthedataneeded,andcompletingandreviewingthecollectionofinformation.Sendcommentsregardingthisburdenestimateoranyotheraspectofthiscollectionofinformation,includingsuggestionsforreducingthisbur
8、den,toWashin
