Three-photon-excited fluorescence detection of atomic hydrogen in an atmospheric-pressure flame

Simultaneous spatially resolved NO and NO_2 measurements using one- and two-photon laser-induced fluorescence

“…This work was followed shortly by flame detection of 0 (Ref. 7) and H. 8 , 9 The combination of imaging and multiphoton absorption LIF experiments was also recently report- In this Letter we describe the simultaneous detection of NO and NO 2 by using one laser pulse at 452 nm. This wavelength induces a two-photon transition in the -y band at 226 nm of NO with subsequent fluorescence in the UV spectral region.…”

Digital Image Processing in Flow Visualization

“…Extensions of these techniques to other species have been reported by Alden et al (1984c) for measurement of O2, fo llowed by R detection (Alden et al 1984a) and CO (Alden et al 1984b) in a combusting environment. Atomic hydrogen has been measured by Goldsmith & Anderson (1985) using a two-step saturated fluorescence spectroscopy technique.…”

Interference-free two-photon LIF imaging of atomic hydrogen in flames using picosecond excitation

“…Schemes for excitation of H-atom LIF in flames include two-photon ðk ¼ 205 nmÞ excitation to Hðn ¼ 3Þ [5][6][7], three-photon ðk ¼ 292 nmÞ excitation to Hðn ¼ 4Þ [8,9], and two-step, three-photon ðk 1 ¼ 243 nm; k 2 ¼ 656 nmÞ excitation Hðn ¼ 3Þ via the Hðn ¼ 2Þ intermediate level [10]. The latter two schemes have significant disadvantages for LIF imaging measurements.…”