Single-beam CARS

Equation (7.5) is very important for single-beam CARS applications, because it quantifies the range of vibrational modes that can be accessed with a given laser pulse. Clearly, pulses with a broader spectrum and thus higher optical bandwidth allow covering a wider range of vibrational energies, as has also been pointed out in Table 7.1. It is, however, absolutely necessary that the pulses are perfectly compressed in the sample, so that all colors arrive at the same time. 

FIGURE 7.11 Time-resolved single-beam CARS transients (left column) and corresponding Fourier spectra (right column) for bromotrichloromethane (CBrClj), chloroform (CHClj), bromoform (CHBrj) and a mixture of the three constituents. This result shows that the different components can clearly be distinguished by their characteristic vibrational resonances, (von Vacano and Motzkus 2007b). (From von Vacano and Motzkus, Phys. Chem. Chem. Phys., 10 681-691, 2008. Used with permission.)... 

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