Applied Physics B

, Volume 107, Issue 3, pp 839–847

Off-axis re-entrant cavity ring-down spectroscopy with a mid-infrared continuous-wave optical parametric oscillator

Authors

  • J. Peltola
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
  • M. Vainio
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
    • Centre of Metrology and Accreditation
  • V. Ulvila
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
  • M. Siltanen
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
  • M. Metsälä
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
    • Laboratory of Physical Chemistry, Department of ChemistryUniversity of Helsinki
Article

DOI: 10.1007/s00340-012-5074-x

Cite this article as:
Peltola, J., Vainio, M., Ulvila, V. et al. Appl. Phys. B (2012) 107: 839. doi:10.1007/s00340-012-5074-x

Abstract

We demonstrate an off-axis cavity ring-down spectroscopy system, which uses a mid-infrared continuous-wave optical parametric oscillator as a light source. Off-axis injection with re-entrant configuration of the ring-down cavity is used to achieve high spectral resolution while maintaining high measurement speed. This makes the setup suitable for sensitive molecular spectroscopy in the mid-infrared region, particularly for studies that require high temporal resolution. Formaldehyde (H2CO) absorption spectrum at 3.4 µm is measured using the off-axis re-entrant cavity ring-down spectrometer.

Copyright information

© Springer-Verlag 2012