High-speed cavity ringdown spectroscopy with increased spectral resolution by simultaneous laser and cavity tuning | Zendy

Isabelle Debecker | Zendy; A.K. Mohamed | Zendy; D. Romanini | Zendy

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High-speed cavity ringdown spectroscopy with increased spectral resolution by simultaneous laser and cavity tuning

Author(s) -

Isabelle Debecker,

A.K. Mohamed,

D. Romanini

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.002906

Subject(s) - optics , laser , spectroscopy , materials science , continuous wave , optical cavity , spectral resolution , cavity ring down spectroscopy , resolution (logic) , physics , spectral line , computer science , quantum mechanics , astronomy , artificial intelligence

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.

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