Completely background free broadband coherent anti-Stokes Raman scattering spectroscopy

For the first time it was proposed a numerical approach to obtain non-NRB time-frequency coherent anti-Stokes Raman scattering (CARS) spectrograms. In order to evaluate the validity of the CARS spectrogram for background free broadband CARS spectroscopy, the authors numerically constructed a CARS spectrogram for an assumed Gaussian probe pulse of 500 fs (FWHM).