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301()Vol.30,No.120072JournalofZhejiangNormalUniversity(Nat.Sci.)Feb.2007:100125051(2007)012001120531,2,1,2,1,2,V.Lozoshy3(1.,321004;2.,321004;3.OhioStateUniversity,ColumbusOH,43210USA):2.23.97m.,,7210-9.,.:;;;:O433.5:AMeasurementofformaldehydeingasmixtureusingcavityring2downspectroscopyZHOUWeidong1,2,RENZhijun1,2,PENGBaojin1,2,V.Lozoshy3(1.InstituteofInformationOptics,ZhejiangNormalUniversity,JinhuaZhejiang321004,China;2.CollegeofMathematic,PhysicsandInfor2mationEngineering,ZhejiangNormalUniversity,JinhuaZhejiang321004,China;3.OhioStateUniversity,ColumbusOH43210,USA)Abstract:Tunablenarrowlinewidthmid2infraredradiation(MIR)from2.2to3.9mwasgeneratedbyanopticalparameteroscillator(OPO).BaseonthehighqualityMIRsource,cavityring2downspectroscopy(CRDS)techniquewasusedforgassensing.Asensitivityof7210-9wasachievedwhenusethesystemtomeasurethetraceH2COingasmixture.Experimentalresultsindicatedthatthesystemhadtheabilityandthepotentialforfuturemulti2tracegasmeasurements.Keywords:OPO;Mid2infrared;CRDS;gassensing0(CavityRing2DownSpectroscopy,CRDS)2080OKeefeDeacon[1],,.CRDS,2,,,3:2006211228:(#CHE0196189);(ZC304006094):(1966-),,,,.:;.,;,CRDS,,.,,[224][528].Beer2Lambart,CRDS,.Richard[9]Beer2Lambart,,,,.,.(OpticalParametricOscillator,OPO),,215m,,[10212].2,.121.2CRD.,2mJ,L1L2PM1M2.R1=R2=L=0.5m,L,3300nm99.97%,,,.L1L2:;P:;M1M2:11.11,:M1M2,M1M299.9%,.M1,,2,,,M2,.21()20072R,L,I0,.,,,,I(t)I(t)I0exp[-(1-R)t/tr]=I0exp[-t/0].10=cL[(1-R)].(1)tr=L/c,c,0().,Beer2Lambart,,:I(t)I0exp{[-(1-R)+L]t/tr}=I0exp[-t/0],1=cL[(1-R)+L].(2),=N,,,N,,(1)(2)=1c(1-10)=N.(3)N.(3),0,,,;,.1.22.QNdYAG(Coherent8020),1064nm532nm,2532nm11064nm.1.NdYAG;2.1064nm532nm;3.1064nm532nm;45.;6.532nm;7.;8.532nm710840nm;9.710840nm(2);10.;11.KTP;12.532nm710840nm(2);13.532nm;14.710840nm532nm;15.710840nm14002130nm;1617.KTP;18.532nm710840nm14002130nm(2);19.1064nm14002130nm;2021.KTP;22.1064nm;23.Ge;24.1064nm;L1,L2,L32311,:912,1011(2),50mm.L110KTP11,20mJ.KTP=54,=0,7mm7mm15mm,,532nm,12710840nm(2)532nm,OPO,9W11W12.,,,710840nm,.12(PZT),,,.9,.2,7,8,,15,18KTP16,17,532nmKTP,18532nm,,KTP,.,710840nm1.452.1m.1.452.1m18(2),YAG1064nm,1.452.1m,2.23.9m,3.0m2mJ.2KTP,,.KTP,.,4,5.1064nm,2mmGe1.452.1m,.34000Pa(2914.3cm-1)23.,4000Pa,2914.3cm-1,2914.46cm-1,N2.,,,10%80%.3=5.1s,1.53km,99.97%.110-6H2CO/N2(510-6H2CO/N2N214),4000Pa,,0.01cm-1.42914.25cm-12914.65cm-1,41()2007HITRAN,42914.496cm-1.,128,44000PaN220.4,3,7210-9.4H2CO2914.46nm3H2CO2914.46cm-1,.,OPOCRD,.(2.23.9m),C2H2HCNOHNH3HClON2CH4C2H6H2COHBrH2SSO2CO2N2OCOOCS.:[1]OKeefeA,DeaconDAG.Cavityring2downopticalspectrometerforabsorptionmeasurementsusingpulsedlasersources[J].ReviewofScientif2icInstruments,1988,59(12):254422551.[2]RomaniniD,LehamannKK.Ring2downcavityabsorptionspectroscopyoftheveryweakHCNovertonebandswithsix,seven,andeightstretc2hingquanta[J].JChemPhys,1993,99(9):628726301.[3]EngelnR,HeldenGV,RoijAJAV,etal.CavityringdownspectroscopyonsolidC60[J].JChemPhys,1999,110(5):273222733.[4]BrownSS,WilsonRW,RavishankaraAR.AbsoluteIntensitiesforThirdandFourthOvertoneAbsorptionsinHNO3andH2O2MeasuredbyCavityRingDownSpectroscopy[J].JPhysChemA,2000,104(21):497624983.[5]PaldusBA,HarbCC,SpenceTG,etal.Cavityringdownspectroscopyusingmid2infraredquantum2cascadelasers[J].OptLett,2000,25(9):6662668.[6]PaulJB,SchererJJ,OkeefeA,etal.Cavityringdownmeasurestraceconcentrations[J].LaserFocusWorld,1997,33(3):71275.[7]BallSM,PoveyIM,NortonEG,etal.BroadbandcavityringdownspectroscopyoftheNO3radical[J].ChemPhysLett,2001,342(1/2):1132120.[8]BrownSS,StarkH,CicioraSJ,etal.In2situmeasurementofatmosphericNO3andNO5viacavityring2downspectroscopy[J].GeophysResLett,2001,28(17):322723230.[9]ZaickiP,RichardNZ.Cavity2ringdownspectroscopyforquantitativeabsorptionmeasurement[J].JChemPhys,1995,102(7):270722717.[10]PetrovKP,CurlRF,TittelKF.Compactlaserdifference2frequencyspectrometerformulti2componenttracegasdetection[J].ApplPhys,1998,B66(3):5312538.[11]SchillerS,SchoserS,BraxmaierC,etal.Singlefrequencycwopticalparametricoscillators:Devicesandapplications[C]//BlattR,EschnerJ,LerbfriedD,etal.LaserSeoectroscopyProceedingsoftheXIVInternationalCoference(ICOLS99).Singapore:WorldScientificPublisher,1999:2172226.[12]TangCL,BosenbergWR,UkachiT,etal.Opticalparametricoscillators[J].ProceedingsoftheIEEE,1992,80(3):3652373.()511,: