Nitrogen spectra of the Q-branch of the fundamental and the first hot bands were recorded with a high-resolution stimulated Raman spectrometer at atmospheric pressure and cu. 1300 K. The absolute frequencies of the Raman lines were measured with high accuracy, leading to a refinement of spectroscopic constants. A temperature estimation was also performed from the Raman intensities.
Two experimental coherent Raman techniques, stimulated Raman and coherent antiStokes Raman spectroscopy (CARS), were employed to study the Raman spectrum of CF, in the 900 cm-I region. The stimulated Raman and CARS spectra of the v, band of CF, were recorded at high resolution. The analysis of these spectra enabled some spectroscopic constants of this band to be refined and higher order constants to be determined for the first time. The first high-resolution CARS spectrum of the 2v, ( A , ) harmonic band is also presented. The rotational transitions of this band up to J = 40 were assigned and the first set of spectroscopic constants for this sub-level were determined. These results improve our knowledge about the Raman-allowed vibrational bands of CF, .
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