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Optics Letters

Optics Letters


  • Vol. 26, Iss. 1 — Jan. 1, 2001
  • pp: 36–38

Nitric oxide flow tagging in unseeded air

Nico Dam, R. J. H. Klein-Douwel, Nanna M. Sijtsema, and J. J. ter Meulen  »View Author Affiliations

Optics Letters, Vol. 26, Issue 1, pp. 36-38 (2001)

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A scheme for molecular tagging velocimetry is presented that can be used in air flows without any kind of seeding. The method is based on the local and instantaneous creation of nitric oxide (NO) molecules from N2 and O2 in the waist region of a focused ArF excimer laser beam. This NO distribution is advected by the flow and can be visualized any time later by laser-induced fluorescence in the γ bands. The creation of NO is confirmed by use of an excitation spectrum. Two examples of the application of the new scheme for air-flow velocimetry are given in which single laser pulses are used for creation and visualization of NO.

© 2001 Optical Society of America

OCIS Codes
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(280.2490) Remote sensing and sensors : Flow diagnostics
(280.7060) Remote sensing and sensors : Turbulence
(280.7250) Remote sensing and sensors : Velocimetry

Nico Dam, R. J. H. Klein-Douwel, Nanna M. Sijtsema, and J. J. ter Meulen, "Nitric oxide flow tagging in unseeded air," Opt. Lett. 26, 36-38 (2001)

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