Open AccessFemtosecond, two-photon, planar laser-induced fluorescence of carbon monoxide in flames
Author(s) -
Daniel Richardson,
Sukesh Roy,
James R. Gord
Publication year - 2017
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.42.000875
Subject(s) - femtosecond , materials science , laser , optics , planar laser induced fluorescence , excitation , laser induced fluorescence , fluorescence , rotational–vibrational spectroscopy , ultraviolet , atomic physics , optoelectronics , physics , excited state , quantum mechanics
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 -1 ) was used to pump many rovibrational two-photon transitions in the B 1 ∑ + ←X 1 ∑ + 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 10 W/cm 2 , negligible photolytic interferences were observed, and PLIF imaging of dynamic flame events was performed at 1 kHz.