Cavity enhanced FTIR spectroscopy using a femto OPO absorption source

Xavier de Ghellinck d'Elseghem Vaernewijck (1) , Keevin Didriche (1) , Clement Lauzin (1) , Atina Rizopoulos (1) , Michel Herman (1) , Samir Kassi (2)

1 Service de Chimie Quantique et Photophysique
2 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]

The nu1+nu3 band of 12C2H2 was recorded using a high resolution continuous scan Fourier transform interferometer fitted with a femto OPO absorption source. Various experimental schemes were successfully used, including multipass absorption in a cell and also in a supersonic expansion, and cavity enhanced absorption. An optimal rms noise equivalent absorption of 2.2 10-9 cm-1 Hz(-1/2) per spectral element was reached in the latter case, corresponding to alpha min = 1.5 10-7 cm-1. Performances are illustrated and discussed.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]; Optique [physics.optics]

Xavier de Ghellinck d'Elseghem Vaernewijck, Keevin Didriche, Clement Lauzin, Atina Rizopoulos, Michel Herman, et al.. Cavity enhanced FTIR spectroscopy using a femto OPO absorption source. Molecular Physics, 2011, 109, pp.2173-2179. ⟨10.1080/00268976.2011.602990⟩. ⟨hal-00722799⟩