Simultaneous multi-laser, multi-species trace-level sensing of gas mixtures by rapidly swept continuous-wave cavity-ringdown spectroscopy.
Opt Express
; 18(19): 20059-71, 2010 Sep 13.
Article
em En
| MEDLINE
| ID: mdl-20940896
ABSTRACT
The greenhouse-gas molecules CO(2), CH(4), and H(2)O are detected in air within a few ms by a novel cavity-ringdown laser-absorption spectroscopy technique using a rapidly swept optical cavity and multi-wavelength coherent radiation from a set of pre-tuned near-infrared diode lasers. The performance of various types of tunable diode laser, on which this technique depends, is evaluated. Our instrument is both sensitive and compact, as needed for reliable environmental monitoring with high absolute accuracy to detect trace concentrations of greenhouse gases in outdoor air.
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Base de dados:
MEDLINE
Assunto principal:
Espectrofotometria Infravermelho
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Transdutores
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Misturas Complexas
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Lasers Semicondutores
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Gases
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Microquímica
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article