Applied Physics B

, Volume 80, Issue 2, pp 255–260

Development of a compact quantum cascade laser spectrometer for field measurements of CO2 isotopes

  • D. Weidmann
  • G. Wysocki
  • C. Oppenheimer
  • F.K. Tittel
Article

DOI: 10.1007/s00340-004-1639-7

Cite this article as:
Weidmann, D., Wysocki, G., Oppenheimer, C. et al. Appl. Phys. B (2005) 80: 255. doi:10.1007/s00340-004-1639-7

Abstract

We report the development of a field-deployable, pulsed quantum cascade laser spectrometer. The instrument is designed to measure the 13C/12C isotopic ratio in the CO2 released from volcanic vents. Specific 12CO2 and 13CO2 absorption lines were selected around 4.3 μm, where the P-branch of 12CO2 overlaps the R-branch of 13CO2 of the 0001–0000 vibrational transition. This particular selection makes the instrument insensitive to temperature variations. A dual-channel cell balances the two absorption signals. We provide details of the instrument design and a preliminary demonstration of its performance based on laboratory measurements of 16O12C16O and 16O12C18O.

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • D. Weidmann
    • 1
  • G. Wysocki
    • 1
  • C. Oppenheimer
    • 2
  • F.K. Tittel
    • 1
  1. 1.Rice Quantum InstituteRice UniversityHoustonUSA
  2. 2.Department of GeographyCambridgeUK

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