基于多模泵浦光参量振荡器的高速 CH 平面激光诱导荧光成像。
High-speed CH planar laser-induced fluorescence imaging using a multimode-pumped optical parametric oscillator.
机构信息
Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, USA.
出版信息
Opt Lett. 2011 Oct 1;36(19):3927-9. doi: 10.1364/OL.36.003927.
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 431.1 nm. Signal-to-noise ratios of ~25-35 are the highest yet reported for high-speed CH PLIF.
我们报告了在使用多模泵浦光参量振荡器（OPO）的湍流扩散火焰中进行的高速 CH 平面激光诱导荧光（PLIF）成像。OPO 由多模 Nd:YAG 簇的三倍频输出泵浦，用于 CH 自由基的 A-X（0,0）带中的直接信号激发。激光阈值、转换效率和线宽被证明取决于 OPO 环形腔中的泵浦通过次数。在 431.1nm 处，以高达 6mJ/脉冲的激发能量，以 10kHz 的速率获取单次 CH PLIF 图像。信噪比高达 25-35，这是迄今为止报道的最高值，用于高速 CH PLIF。
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