, Volume 85, Issue 2-3, pp 243-249
Date: 01 Aug 2006

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

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Abstract

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.

PACS

33.20.Ea; 42.62.Fi; 42.68.Ca; 85.35.Be