可调谐激光二极管吸收光谱残余光强调制补偿技术研究.pdf

第23卷第7期 传感技，术学报 V01．23No．7 CHINESE OFSENSORSANDACTUATORS JOURNAL 2010 2010年7月 July onthe of Study CompensationTechnologyRemainingLight 4 ModulationinTDLAS Intensity LIANG Jun2 B01，ZHUYongh，BAO耽川1，CHENJunqin92，ZHANGJun2，CHEN KeyLaboratoryforOptoelectronicTechnology＆跏㈣，EducationMinistry ，1．The ofChina，ChongqingUniversity，Chongqing400030，China．、 SichuanInstrument 、2．TechnicalCenter。Chongqing ComplexCo．Ltd，Chongqing400030，China ， influenceofthe modulationonsecondharmonicdetectionand Abstract：The remainingintensity digitalsignalpro— intunablediodelaser was method cessing absorptionspectroscopysystemanalyzed．Asynchronouscompensation was forwardandan basedonthevariableattenuator(MEMSVOA)was put experimentalsetup optical putup．The showsthat result withthe ofthe modulation VOA，the experimental synchronouscompensation remainingintensity level to1／20of re— Was down its level．andabout60％ofthesecondharmonicdistortionwas dropped original moved．The ofthis methodwas demonstratedour feasibilitysynchronouscompensationtentatively by experiments． Keywords：absorptionspectroscopy；remaininglightintensity EEACC：7220 可调谐激光二