Applied Physics B

, Volume 117, Issue 1, pp 113–120 | Cite as

Quartz-enhanced photoacoustic spectroscopy-based sensor system for sulfur dioxide detection using a CW DFB-QCL

  • J. P. Waclawek
  • R. Lewicki
  • H. Moser
  • M. Brandstetter
  • F. K. Tittel
  • B. Lendl


Sulfur dioxide (SO2) trace gas detection based on quartz-enhanced photoacoustic spectroscopy (QEPAS) using a continuous wave, distributed feedback quantum cascade laser operating at 7.24 μm was performed. Influence of water vapor addition on monitored QEPAS SO2 signal was also investigated. A normalized noise equivalent absorption coefficient of NNEA (1σ) = 1.21 × 10−8 cm−1 W Hz−1/2 was obtained for the ν 3 SO2 line centered at 1,380.93 cm−1 when the gas sample was moisturized with 2.3 % H2O. This corresponds to a minimum detection limit (1σ) of 63 parts per billion by volume for a 1 s lock-in time constant.


Minimum Detection Limit Quartz Tuning Fork Wavelength Modulation Spectroscopy QEPAS Signal QEPAS Sensor 
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JPW, HM and MB acknowledge financial support provided by the Austrian research funding association under the scope of the COMET program within the research network “Process Analytical Chemistry” (contract # 825340) and the Carinthian Tech Research RL, FKT acknowledge financial support provided by NSF ERC MIRTHE and NSF-ANR NexCILAS.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • J. P. Waclawek
    • 1
  • R. Lewicki
    • 2
  • H. Moser
    • 1
  • M. Brandstetter
    • 1
  • F. K. Tittel
    • 2
  • B. Lendl
    • 1
  1. 1.Institute of Chemical Technologies and AnalyticsVienna University of TechnologyViennaAustria
  2. 2.Electrical and Computer Engineering DepartmentRice UniversityHoustonUSA

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