Quantitative femtosecond, two-photon laser-induced fluorescence of atomic oxygen in high-pressure flames.
Quantitative femtosecond, two-photon laser-induced fluorescence of atomic oxygen in high-pressure flames.
复制标题
高压火焰中原子氧的定量飞秒、双光子激光诱导荧光。
DOI：
10.1364/ao.58.001984
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发表时间：
2019
期刊：
影响因子：
1.9
通讯作者：
T. Meyer
中科院分区：
文献类型：
--
作者：
K. A. Rahman;V. Athmanathan;M. Slipchenko;Sukesh Roy;J. Gord;Zhili Zhang;T. Meyer
在10个大气压的H2/空气火焰中，研究了飞秒双光子激光诱导氧原子荧光的定量特性。利用226.1nm飞秒激光泵浦氧原子的3 pP ~ 3 J ′ = 0，1，2 2 pP ~ 3 J“= 0，1，2电子跃迁。多光子去激发，生产原子氧，光解干扰的贡献进行了研究，并通过限制激光辐照度为1011 W/cm 2的最小化。在H2/空气层流校准燃烧器中，在宽范围的燃料-空气比和压力下，实现了与原子氧的理论平衡摩尔分数的定量一致。
Quantitative femtosecond two-photon laser-induced fluorescence of atomic oxygen was demonstrated in an H2/air flame at pressures up to 10 atm. Femtosecond excitation at 226.1 nm was used to pump the 3pP3J'=0,1,2←←2pP3J''=0,1,2 electronic transition of atomic oxygen. Contributions from multiphoton de-excitation, production of atomic oxygen, and photolytic interferences were investigated and minimized by limiting the laser irradiance to ∼1011 W/cm2. Quantitative agreement was achieved with the theoretical equilibrium mole fraction of atomic oxygen over a wide range of fuel-air ratios and pressures in an H2/air laminar calibration burner.