Absorption spectroscopy with quantum cascade lasers

A. A. Kosterev, R. F. Curl, F. K. Tittel, C. Gmachl, F. Capasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Novel pulsed and cw quantum cascade distributed feedback (QC-DFB) lasers operating near λ = 8 μm were used for detection and quantification of trace gases in ambient air by means of sensitive absorption spectroscopy. N2O, 12CH4, 13CH4, and different isotopic species of H2O were detected. Also, a highly selective detection of ethanol vapor in air with a sensitivity of 125 parts per billion by volume (ppb) was demonstrated.

Original languageEnglish (US)
Pages (from-to)39-49
Number of pages11
JournalLaser Physics
Issue number1
StatePublished - Jan 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering


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