Applied Physics B

, Volume 85, Issue 2, pp 279–284

Photoacoustic detection of NO2 and N2O using quantum cascade lasers

  • J.P. Lima
  • H. Vargas
  • A. Miklós
  • M. Angelmahr
  • P. Hess
Article

DOI: 10.1007/s00340-006-2357-0

Cite this article as:
Lima, J., Vargas, H., Miklós, A. et al. Appl. Phys. B (2006) 85: 279. doi:10.1007/s00340-006-2357-0
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Abstract

Pulsed quantum cascade lasers (QCLs) with 6.2-μm and 8-μm wavelengths and a differential photoacoustic (PA) detector were used to measure concentrations of NO2 and N2O in the sub-ppmv range at ambient pressure. The QCL temperatures were tuned between -40 °C and 30 °C. Good agreement was found between measured PA vibrational spectra and simulated HITRAN spectra of both nitrogen oxides. The PA signals showed a linear dependence on the concentration in the investigated 0.5–50 ppmv region in both cases. The results for N2O are compared with a PA measurement of N2O at 2.9 μm using a grazing-incidence optical parametric oscillator.

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • J.P. Lima
    • 1
  • H. Vargas
    • 1
  • A. Miklós
    • 2
  • M. Angelmahr
    • 2
  • P. Hess
    • 2
  1. 1.Laboratório de Ciências Físicas – CCTUniversidade Estadual do Norte Fluminense Darcy RibeiroRio de JaneiroBrazil
  2. 2.Institute of Physical ChemistryUniversity of HeidelbergHeidelbergGermany