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Opt Express. 2009 Mar 2;17(5):3673-8.

Cavity ring-down absorption spectrography based on filament-generated supercontinuum light.

Author information

  • 1Institute of Experimental Physics, Free University of Berlin, Arnimallee 14, 14195 Berlin, Germany. kamil.stelmaszczyk@physik.fu-berlin.de

Abstract

We performed simultaneous, multispectral CRDS measurements that for the first time use the Supercontinuum light source. We called this approach Supercontinuum Cavity Ring-Down Spectrography (SC CRDSpectrography) and successfully applied it to measuring the absorption spectrum of NO2 gas at a concentration of 2 ppm. The extrapolated sensitivity of our setup was much greater, about 5 ppb. The ppb sensitivity level is comparable to this obtainable with single wavelength dye-lasers based CRDS systems. It is, therefore, feasible to construct extremely broadband and sensitive CRDS devices basing on the SC CRDSpectrography scheme.

PMID:
19259207
[PubMed]
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