A compact quantum-cascade laser based spectrometer for monitoring the concentrations of methane and nitrous oxide in the troposphere

N. Langford, G. Duxbury, S. Wright

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A spectrometer, based on the frequency down-chirped radiation from a pulsed quantum-cascade laser, capable of detecting fluctuations in local ground level methane and nitrous oxide concentrations over a time scale of minutes, is presented. The applicability of this instrument to low-level atmospheric detection is demonstrated through sampling gases in two locations.
Original languageEnglish
Pages (from-to)243-249
Number of pages6
JournalApplied Physics B: Lasers and Optics
Issue number2-3
Publication statusPublished - 2006


  • lasers
  • optics
  • photonics
  • plasmas
  • methane
  • troposphere
  • applied physics

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