Simultaneous multi-laser, multi-species tracelevel sensing of gas mixtures by rapidly swept continuous-wave cavity-ringdown spectroscopy

Yabai He*, Ruifeng Kan, Florian V. Englich, Wenqing Liu, Brian J. Orr

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The greenhouse-gas molecules CO2, CH4, and H 2O are detected in air within a few ms by a novel cavity-ring down 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.

Original languageEnglish
Pages (from-to)20059-20071
Number of pages13
JournalOptics Express
Volume18
Issue number19
DOIs
Publication statusPublished - 13 Sep 2010

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