Applied Physics B

, 123:147 | Cite as

Intracavity absorption spectroscopy of formaldehyde from 6230 to 6420 cm−1

  • Peter Fjodorow
  • Ortwin Hellmig
  • Valery M. Baev
  • Howard B. Levinsky
  • Anatoli V. Mokhov
Article
Part of the following topical collections:
  1. Field Laser Applications in Industry and Research

Abstract

We apply intracavity absorption spectroscopy for measurements of the absorption spectrum of formaldehyde, CH2O, from 6230 to 6420 cm−1, of which only a small fraction (6351–6362 cm−1) has been recorded elsewhere. The measurements are performed in the cavity of a broadband Er3+-doped fiber laser, with a sensitivity corresponding to the effective absorption path length of 45 m and a spectral resolution of 0.1 cm−1. The noise-equivalent detection limit of CH2O achieved with the strongest absorption line at 6252.64 cm−1 is estimated to be 5 ppm. High tolerance to broadband losses and the accessible time resolution of 50 µs make it possible to apply this detection system for time-resolved monitoring of CH2O together with other molecules in harsh combustion environments, e.g., in combustion engines.

Keywords

CH2O Laser Cavity Ignition Delay Time Ignition Process Dope Fiber Laser 
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.

Notes

Acknowledgements

We are thankful to H. Top and J. H. Marsman for their help in wet-chemical analysis and making formaldehyde.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Peter Fjodorow
    • 1
  • Ortwin Hellmig
    • 2
  • Valery M. Baev
    • 2
  • Howard B. Levinsky
    • 3
  • Anatoli V. Mokhov
    • 3
  1. 1.Institute for Combustion and Gas DynamicsUniversity of Duisburg-EssenDuisburgGermany
  2. 2.Institute of Laser PhysicsUniversity of HamburgHamburgGermany
  3. 3.Energy and Sustainability Research InstituteUniversity of GroningenGroningenThe Netherlands

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