Abstract
Cavity ringdown spectroscopy (CRDS) is a highly sensitive spectroscopic technique that has been successfully applied to problems such as trace gas detection and the observation of weak spectra. Despite possessing several intrinsic advantages over other techniques, CRDS has not yet been widely used to study spectral line shapes. Therefore, we begin with an introduction to CRDS, followed by a discussion of practical considerations and quantitative data analysis for an important variation of CRDS: high‐resolution CRDS. We then briefly discuss the features and objectives of two high‐resolution CRDS experiments in our laboratory. The first experiment uses a continuous wave CO2 laser operating in the 920 cm−1 to 1090 cm−1 region. The principal objective of this experiment is to make accurate measurements of water vapor continuum absorption. The second experiment uses an external cavity diode laser operating in the 10500 cm−1 to 10860 cm−1 region. This experiment utilizes the frequency comb of a length‐stabilize...
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