Journal or Book Title
We report on high-speed CH planar laser-induced fluorescence (PLIF) imaging in turbulent diffusion flames using a multimode-pumped optical parametric oscillator (OPO). The OPO is pumped by the third-harmonic output of a multimode Nd:YAG cluster for direct signal excitation in the A-X (0,0) band of the CH radical. The lasing threshold, conversion efficiency, and linewidth are shown to depend on the number of pump passes in the ring cavity of the OPO. Single-shot CH PLIF images are acquired at 10 kHz with excitation energy up to 6 mJ=pulse at 431:1nm. Signalto- noise ratios of ∼25–35 are the highest yet reported for high-speed CH PLIF.
This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ol/abstract.cfm?uri=ol-36-19-3927. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Optical Society of America
Miller, Joseph D.; Engel, Sascha R.; Meyer, Terrence R.; Seeger, Thomas; and Leipertz, Alfred, "High-speed CH planar laser-induced fluorescence imaging using a multimode-pumped optical parametric oscillator" (2011). Mechanical Engineering Publications. 182.