Knowledge Bank

During recent years, we have developed a fibered DFB laser CW-CRDS spectrometer providing routine noise equivalent absorption of $\alpha_{min}\approx5\times10^{-11} $cm$^{-1}$,overthe5850-8350cm$^{-1}$ range. A detection limit of $\alpha_{min}\approx5\times10^{-13} $cm$^{-1}$ has been recently achieved by averaging spectra over a small spectral interval. The performances of this set up have allowed extending significantly the knowledge of the absorption spectra of molecules of major importance: methane, oxygen, water, ozone, carbon dioxide, hydrogen, nitrogen. The most striking results will be presented.