Applied Physics B

, Volume 119, Issue 1, pp 21–27 | Cite as

A quartz-enhanced photoacoustic sensor for H2S trace-gas detection at 2.6 μm

  • S. Viciani
  • M. Siciliani de Cumis
  • S. Borri
  • P. Patimisco
  • A. Sampaolo
  • G. Scamarcio
  • P. De Natale
  • F. D’Amato
  • V. Spagnolo


We report on the realization of a quartz-enhanced photoacoustic (QEPAS) sensor for measurement of H2S gas traces. A distributed feedback diode laser working at 2.64 µm wavelength has been coupled to an acoustic detection module composed of a quartz tuning fork and a micro-resonator system, and the QEPAS signal has been optimized in terms of gas sample pressure and laser frequency modulation depth. The sensor shows a very good linearity with respect to the H2S concentration. We performed an Allan–Werle variance analysis to investigate the sensor long-term stability, and we reached a detection limit of four parts per million for 1-s integration time and 500 parts per billion in 60-s integration time. The realized QEPAS sensor represents a good compromise between performance and handiness, in view of a fully portable device.


Quartz Tuning Fork Integrate Cavity Output Spectroscopy Residual Amplitude Modulation QEPAS Signal QEPAS Sensor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors gratefully acknowledge the financial support from the Italian Ministry of University and Research (MIUR) through the project “Active Ageing at Home” (CTN01_00128_297061, Area TAV - Tecnologie per gli Ambienti di Vita), from Regione Toscana within the frame of POR CReO FESR 2007–2013, Project SIMPAS (Innovative Measurement Systems for the Protection of Environment and Health), and the Italian research projects PON01 02238, PON02 00675 and PON02 00576.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • S. Viciani
    • 1
  • M. Siciliani de Cumis
    • 1
  • S. Borri
    • 1
  • P. Patimisco
    • 2
  • A. Sampaolo
    • 2
  • G. Scamarcio
    • 2
  • P. De Natale
    • 1
  • F. D’Amato
    • 1
  • V. Spagnolo
    • 2
  1. 1.CNR, Istituto Nazionale di Ottica (INO)European Laboratory for Nonlinear Spectroscopy (LENS)Sesto FiorentinoItaly
  2. 2.Dipartimento Interateneo di Fisica, CNR, Istituto di Fotonica e Nanotecnologie (IFN) UOS BariUniversità e Politecnico di BariBariItaly

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