Saturated-absorption cavity ring-down spectroscopy

Year: 2010

Authors: Giusfredi G., Bartalini S., Borri S., Cancio P., Galli I., Mazzotti D., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica (INO)-CNR, Largo Fermi 6, 50125 Firenze FI, Italy; European Laboratory for Nonlinear Spectroscopy (LENS), Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Abstract: We report on a novel approach to cavity ring-down spectroscopy with the sample gas in saturated-absorption regime. This technique allows us to decouple and simultaneously retrieve the 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).

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 104 (11)      Pages from: 110801  to: 110801

More Information: We wish to thank G. Di Lonardo and F. Tamassia for useful discussions, R. Ballerini (LENS, Italy) for making the cavity. This work was partially funded by Ente Cassa di Risparmio di Firenze and by CNR and the other European research funding agencies participating in the European Science Foundation EUROCORES Program EUROQUAM-CIGMA.
KeyWords: Absorption cavity; Absorption signals; Cavity ring-down spectroscopy; Excited vibrational state; High sensitivity; Hyperfine structure; Natural abundance; Spectroscopic application; Theoretical models, Gas absorption; Light measurement, Absorption spectroscopy
DOI: 10.1103/PhysRevLett.104.110801

Citations: 118
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