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

被引：29
作者：
Giusfredi, G. [1 ]
Galli, I.
Mazzotti, D.
Cancio, P.
De Natale, P.
机构：
[1] CNR, INO, I-50019 Sesto Fiorentino, FI, Italy
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2015年 / 32卷 / 10期
关键词：
SPECTROSCOPY; COLLISIONS; RELAXATION; BAND; HCN;
D O I：
10.1364/JOSAB.32.002223
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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
引用
收藏
页码：2223 / 2237
页数：15
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