High Precision, SI-traceable, Mid-Infrared Molecular Spectroscopy
Résumé
We present SI-traceable mid-infrared highresolution saturated absorption spectroscopy measurements conducted on methanol. Resolutions of few hundreds of kilohertz and record sensitivities of a few kilohertz (10-10) on transition center frequencies are obtained in a multi-pass cell. Promising results have also been obtained in transmission of a 3-m long Fabry-Perot cavity yielding resolutions of a few tens of kilohertz which paves the way to the sub-kilohertz (10-12) level of vibrational frequency accuracy.
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