title: High-speed cavity ringdown spectroscopy with increased spectral resolution by simultaneous laser and cavity tuning.
abstract: Cavity ringdown spectroscopy is an efficient gas-sensing method, but improvement in measurement speed is required before this method can be applied to the analysis of fast phenomena. We present a new continuous-wave cavity ringdown design, involving fast tuning of the laser frequency and a rapidly swept optical cavity, to allow high-speed sensing with spectral resolution refinement. This approach, which provides a simple and versatile instrument, is investigated numerically and experimentally. By performing detection of a forbidden transition of molecular oxygen near 766 nm during a 2-ms single sweep of the laser frequency, we show that our system fulfils the requirements for probing rapid chemical processes.
authors.forename: I
authors.initials: I
authors.lastname: Debecker
authors.forename: A K
authors.initials: AK
authors.lastname: Mohamed
authors.forename: D
authors.initials: D
authors.lastname: Romanini