Applied Physics B

, Volume 103, Issue 1, pp 223–228

Rapid and sensitive trace gas detection with continuous wave Optical Parametric Oscillator-based Wavelength Modulation Spectroscopy

  • D. D. Arslanov
  • M. Spunei
  • A. K. Y. Ngai
  • S. M. Cristescu
  • I. D. Lindsay
  • S. T. Persijn
  • K. J. Boller
  • F. J. M. Harren
Open AccessArticle

DOI: 10.1007/s00340-010-4242-0

Cite this article as:
Arslanov, D.D., Spunei, M., Ngai, A.K.Y. et al. Appl. Phys. B (2011) 103: 223. doi:10.1007/s00340-010-4242-0
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Abstract

A fiber-amplified Distributed Bragg Reflector diode laser is used to pump a continuous wave, singly resonant Optical Parametric Oscillator (OPO). The output radiation covers the 3–4 μm with ability of rapid (100 THz/s) and broad mode-hop-free tuning (5 cm−1). Wavelength Modulation Spectroscopy is combined with the OPO to take optimal advantage of the spectral scan speed. The sensitivity of the system was determined as 0.8 ppbv (parts-per-billion by volume) for ethane (C2H6) for the absorption peak at 2996.9 cm−1 recorded in 1.3 seconds, corresponding to a noise equivalent absorption sensitivity (NEAS) of 1.2×10−9 cm−1/Hz1/2. A comparison between results using the 1st, 2nd and 4th harmonic derivative signal from wavelength modulation was performed. The broad continuous tunability was demonstrated by covering 35 cm−1 while recording absorption features of ethane, methane and water.

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© The Author(s) 2010

Authors and Affiliations

  • D. D. Arslanov
    • 1
  • M. Spunei
    • 1
    • 2
  • A. K. Y. Ngai
    • 1
  • S. M. Cristescu
    • 1
  • I. D. Lindsay
    • 3
  • S. T. Persijn
    • 2
  • K. J. Boller
    • 4
  • F. J. M. Harren
    • 1
  1. 1.Life Science Trace Gas Facility, Molecular and Laser Physics, Institute for Molecules and MaterialsRadboud UniversityNijmegenThe Netherlands
  2. 2.VSLDelftThe Netherlands
  3. 3.EPSRC Advanced Research Fellow Nanophysics and Soft Matter Group, H.H. Wills Physics LaboratoryUniversity of BristolBristolUK
  4. 4.Laser Physics and Nonlinear Optics Group, Faculty of Science and TechnologyUniversity of TwenteEnschedeThe Netherlands