Abstract
The retrieval of molecular energy levels, the relation between collisional processes and absorption line shapes, the extraction of thermodynamic and kinetic properties of gases from absorption profiles require the ability of measuring absorption spectra with a highly accurate frequency axis. This task was strongly facilitated in recent years by the availability of optical frequency combs. However, apart from few exceptions [1—3], accuracy has been seldom joined with high sensitivity, which is of particular interest in the study of weak absorbers and in the reduction of pressure broadening mechanisms.
© 2015 IEEE
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