Cavity ring-down absorption spectrography based on filament-generated supercontinuum light.
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.
Stelmaszczyk
Kamil
K
Institute of Experimental Physics, Free University of Berlin, Arnimallee 14, 14195 Berlin, Germany. kamil.stelmaszczyk@physik.fu-berlin.de
Rohwetter
Philipp
P
Fechner
Martin
M
Queisser
Manuel
M
Czyzewski
Adam
A
Stacewicz
Tadeusz
T
Wöste
Ludger
L