Dual interband cascade laser based trace-gas sensor for environmental monitoring

Gerard Wysocki, Yury Bakhirkin, Stephen So, Frank K. Tittel, Cory J. Hill, Rui Q. Yang, Matthew P. Fraser

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


The development of an interband cascade laser (ICL) based spectroscopic trace-gas sensor for the simultaneous detection of two atmospheric trace gases is reported. The sensor performance was evaluated using two ICLs capable of targeting formaldehyde (H2CO) and ethane (C2H 6). Minimum detection limits of 3.5 ppbV for H2CO and 150 pptV for C2H6 was demonstrated with als integration time. The sensor was deployed for field measurements of H2CO, and laboratory quantification of both formaldehyde and ethane are reported. A cross comparison of the atmospheric concentration data for H2CO with data collected by a collocated commercial H2CO sensor employing Hantzsch reaction based fluorometric detection was performed. These results show excellent agreement between these two different approaches for trace-gas quantification. In addition, laboratory experiments for dual gas quantification show accurate, fast response with no crosstalk between the two gas channels.

Original languageEnglish (US)
Pages (from-to)8202-8210
Number of pages9
JournalApplied Optics
Issue number33
StatePublished - Nov 20 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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