Theory of saturated-absorption cavity ring-down: radiocarbon dioxide detection, a case study

Year: 2015

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

Autors Affiliation: CNR, Istituto Nazionale di Ottica, I-50019 Sesto Fiorentino, FI, Italy; European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, FI, Italy

Abstract: The theoretical bases of saturated-absorption cavity ring-down (SCAR) spectroscopy are treated and described in detail in different transition broadening regimes. All the approximations that are introduced to achieve a model as simple and accurate as possible are discussed. In the Voigt broadening regime, a calibration factor that relates the measured spectral areas in the saturated and linear absorption regimes is retrieved. A relevant application of this technique to the measurement of radiocarbon dioxide concentration at both enriched and natural abundance (similar to 10(-12)) is presented. The population relaxation rate of one ro-vibrational state of the nu(3) band is measured for this highly diluted CO2 isotopologue. (C) 2015 Optical Society of America


Volume: 32 (10)      Pages from: 2223  to: 2237

More Information: ESFRI Roadmap, Extreme Light Infrastructure (ELI) Project; EU 7th Framework Program, Laserlab-Europe (284464); Italian Ministry of Foreign Affairs; Programma Nazionale di Ricerche in Antartide (PNRA) (2013/AC4.01).
DOI: 10.1364/JOSAB.32.002223

Citations: 26
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