Saturated-absorption cavity ring-down spectroscopy

Details Saturated-absorption cavity ring-down spectroscopy Saturated-absorption cavity ring-down spectroscopy

2009-12-04

arxiv.org/abs/0912.0831v2

Physics

Optics

PDFLaTeX, 4 pages, 3 PDF figures

Scientific paper

10.1103/PhysRevLett.104.110801

We report on a novel approach to cavity-ring-down spectroscopy with the sample gas in saturated-absorption regime. This technique allows to decouple and simultaneously retrieve empty-cavity background and absorption signal, by means of a theoretical model that we developed and tested. The high sensitivity and frequency precision for spectroscopic applications are exploited to measure, for the first time, the hyperfine structure of an excited vibrational state of $^{17}$O$^{12}$C$^{16}$O in natural abundance with an accuracy of a few parts in $10^{-11}$.

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