Quantum cascade laser dual-comb spectroscopy (DCS) for methane gas mixture studies

Muriel Lepère, Olivier Browet, Sylvain Leonis, Jean Clément, Pitt Allmendinger, Kuno Knapp, Florian Eigenmann, Markus Mangold

Research output: Contribution to conferencePaper


For a long time FTIR and laser-based spectroscopies have been used for high resolution molecular spectroscopy studies. The recent development of Dual-Comb Spectroscopy at high resolution (<0.001 cm-1) makes this technique a powerful tool for gas phase studies. The IRis-F1 is a dual-comb spectrometer building on quantum cascade laser frequency combs. We show that it is very well adapted for measurements of line shape parameters. Despite its weak abundance, methane effect on climate and atmospheric chemistry is important. We measured with IRis-F1 the half-widths of absorption lines of methane diluted in nitrogen, and compared with results obtained by other spectroscopies.

Original languageEnglish
Publication statusPublished - 31 Mar 2021
EventSPIE BiOS 2021 Digital Forum -
Duration: 6 Mar 202111 Mar 2021

Scientific committee

Scientific committeeSPIE BiOS 2021 Digital Forum
Internet address


  • Dual-comb spectroscopy
  • Gas mixtures
  • High resolution
  • Line shape parameters
  • Methane
  • Mid-infrared
  • Quantum cascade laser


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