Incoherent broad-band cavity-enhanced absorption spectroscopy

A new highly sensitive method for incoherent broad-band cavity-enhanced absorption measurements of gaseous samples, using a white-light source is demonstrated. The light of a short-arc Xe-lamp transmitted by an optically stable cavity is dispersed with a grating monochromator and detected by a sensi...

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Bibliographic Details
Published in:Chemical physics letters 2003-04, Vol.371 (3), p.284-294
Main Authors: Fiedler, Sven E., Hese, Achim, Ruth, Albert A.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Molecular spectra
Physics
Visible spectra
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Summary:A new highly sensitive method for incoherent broad-band cavity-enhanced absorption measurements of gaseous samples, using a white-light source is demonstrated. The light of a short-arc Xe-lamp transmitted by an optically stable cavity is dispersed with a grating monochromator and detected by a sensitive photodiode-array. The technique is a development of the previously published principle of cavity-enhanced absorption spectroscopy. The method is characterized by great experimental simplicity, high sensitivity, and high temporal resolution. These features are demonstrated on basis of the b 1 Σ g +(v ′=2)← X 3 Σ g −(v″=0) absorption transition of molecular oxygen and the S 1, ν ′ ←S 0 absorption spectrum of gaseous azulene at its vapour pressure at room temperature.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(03)00263-X