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Continuous wave, distributed feedback diode laser based sensor for trace-gas detection of ethane

  • K. Krzempek
  • , R. Lewicki
  • , L. Nähle
  • , M. Fischer
  • , J. Koeth
  • , S. Belahsene
  • , Y. Rouillard
  • , L. Worschech
  • , F. K. Tittel

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Résumé

The development of a continuous wave (CW), thermoelectrically cooled (TEC), distributed feedback (DFB) laser diode based spectroscopic trace-gas sensor for ultrasensitive and selective ethane (C 2H 6) concentration measurements is reported. The sensor platform used tunable diode laser absorption spectroscopy (TDLAS) based on a 2f wavelength modulation (WM) detection technique. TDLAS was performed with a 100 m optical path length astigmatic Herriott cell. For an interference free C 2H 6 absorption line located at 2976.8 cm -1 a 1σ minimum detection limit of 240 pptv (part per trillion by volume) with a 1 second lockin amplifier time constant was achieved. In addition, reliable and long-term sensor performance was obtained when operating the sensor in an absorption line locked mode.

langue originaleAnglais
Pages (de - à)251-255
Nombre de pages5
journalApplied Physics B: Lasers and Optics
Volume106
Numéro de publication2
Les DOIs
étatPublié - 1 févr. 2012
Modification externeOui

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