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Raman excitation diagram of and CO with 80 fs pump and Stokes pulses. In the ground electronic state, 2330 and correspond to the excitation of to transitions of and CO, respectively.
Time-resolved femtosecond CARS signal for pure and for a mixture of 25% CO and 75% at various temperatures. The symbols represent experimental data points and the solid lines correspond to the best-fit results obtained by fitting the experimental data points with the data calculated from the theoretical model described in Ref. 2.
Time-resolved femtosecond CARS signal for mixtures of and CO, showing the vibrational beat frequency between the two CARS polarization. The decay rate of the CARS signals is unchanged as the concentration of CO is varied.
Modulation depth of the beat frequency between and CO as a function of CO concentration in . The pump and Stokes laser wavelengths were centered at and , respectively.
Time-resolved femtosecond CARS signal in an atmospheric-pressure -air flame for an equivalence ratio of 1.2.
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