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