Femtosecond, two-photon, planar laser-induced fluorescence of carbon monoxide in flames

Two-photon, planar laser-induced fluorescence (TP-PLIF) of carbon monoxide was performed in steady and driven flames using femtosecond (fs) laser pulses at 1 kHz. Excitation radiation at 230.1 nm (full-width at half-maximum bandwidth of 270  cm ) was used to pump many rovibrational two-photon transi...

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Bibliographic Details
Published in:Optics letters 2017-02, Vol.42 (4), p.875-878
Main Authors: Richardson, Daniel R, Roy, Sukesh, Gord, James R
Format: Article
Language:English
Subjects:
Carbon monoxide
Diffusion flames
Excitation
Femtosecond
High speed
Lasers
Planar laser induced fluorescence
Pumps
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Summary:Two-photon, planar laser-induced fluorescence (TP-PLIF) of carbon monoxide was performed in steady and driven flames using femtosecond (fs) laser pulses at 1 kHz. Excitation radiation at 230.1 nm (full-width at half-maximum bandwidth of 270  cm ) was used to pump many rovibrational two-photon transitions in the B ∑ ←X ∑ system. Visible fluorescence in the range 362-516 nm was captured using an image intensifier and high-speed camera. The signal dependence on excitation energy and wavelength is presented. Photolytic interferences from the ultraviolet laser were explored in a sooting diffusion flame. Using an excitation laser intensity of 10   W/cm , negligible photolytic interferences were observed, and PLIF imaging of dynamic flame events was performed at 1 kHz.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.42.000875