Applied Physics B

, Volume 109, Issue 1, pp 19–26 | Cite as

Radical detection in harsh environments by means of laser-induced fluorescence using a single bidirectional optical fiber

  • Heiner Schwarz
  • Robert Schlögl
  • Raimund HornEmail author


A new experimental method is described enabling detection of hydroxyl radicals (OH) by laser-induced fluorescence in high-temperature gas-phase reactions. This is accomplished by means of a bidirectional optical fiber probe, which is of interest for applications where optical access is limited. An optical setup that allows simultaneous excitation and detection of fluorescence using one and the same fiber has been developed. Complications resulting from coupling as well as laser-induced scattering are addressed, and different fibers are compared with regard to core material composition and geometric collection efficiency. On this basis, a suitable fiber is identified, and OH detection and profile measurements are demonstrated in a premixed laminar flame as reference experiment.


Collection Efficiency Reference Experiment Optical Fiber Probe Optical Breakdown Fiber Probe 
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 kindly appreciate the financial support granted by the “Cluster of Excellence Unifying Concepts in Catalysis” (UniCat), Berlin. Furthermore, we would like to express our thanks to Gerard Meijer for his scientific support and helpful discussions.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlinGermany

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