Format

Send to

Choose Destination
Opt Express. 2008 Jul 7;16(14):10178-88.

Cavity enhanced absorption spectroscopy of multiple trace gas species using a supercontinuum radiation source.

Author information

1
Department of Chemistry, University of Cambridge, Lensfield Road,Cambridge CB2 1EW, UK.

Abstract

Supercontinuum radiation sources are attractive for spectroscopic applications owing to their broad wavelength coverage, which enables spectral signatures of multiple species to be detected simultaneously. Here we report the first use of a supercontinuum radiation source for broadband trace gas detection using a cavity enhanced absorption technique. Spectra were recorded at bandwidths of up to 100 nm, encompassing multiple absorption bands of H(2)O, O(2) and O(2)-O(2). The same instrument was also used to make quantitative measurements of NO(2) and NO(3). For NO(3) a detection limit of 3 parts-per-trillion in 2 s was achieved, which corresponds to an effective 3sigma sensitivity of 2.4 x 10(-9) cm(-1)Hz(-1/2). Our results demonstrate that a conceptually simple and robust instrument is capable of highly sensitive broadband absorption measurements.

PMID:
18607425
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Optical Society of America
Loading ...
Support Center