Impact of input field characteristics on vibrational femtosecond coherent anti-Stokes Raman scattering thermometry.
Impact of input field characteristics on vibrational femtosecond coherent anti-Stokes Raman scattering thermometry.
复制标题
输入场特性对振动飞秒相干反斯托克斯拉曼散射测温的影响。
作者：
Chaobo Yang;P. He;David Escofet;Jiangbo Peng;R. Fan;Xin Yu;D. Dunn
总结了超短脉冲相干反斯托克斯拉曼散射（汽车）测温的三种方法，并建立了相应的时域理论模型。方法之间的差异可以归因于时域模型的输入场特性的变化。也就是说，这三种方法的超短脉冲（汽车）测温可以模拟与统一的模型，只需改变输入场的功能。作为一个具体的例子，混合飞秒/皮秒汽车评估其在燃烧流诊断中的使用;因此，输入场的检查对温度测量的影响集中在振动混合飞秒/皮秒汽车上。从超短脉冲汽车的一般模型出发，模拟了不同输入场参数下的光谱。为了分析输入场影响带来的测温误差，在忽略输入场影响的情况下，对谱进行了拟合，并与拟合结果进行了比较。结果表明，无论如何描述输入脉冲，在实验期间仍然会引入温度误差。然而，通过适当的场表征，可以降低误差的重要性。
In this paper, three ultrashort-pulse coherent anti-Stokes Raman scattering (CARS) thermometry approaches are summarized with a theoretical time-domain model. The difference between the approaches can be attributed to variations in the input field characteristics of the time-domain model. That is, all three approaches of ultrashort-pulse (CARS) thermometry can be simulated with the unified model by only changing the input fields features. As a specific example, the hybrid femtosecond/picosecond CARS is assessed for its use in combustion flow diagnostics; thus, the examination of the input field has an impact on thermometry focuses on vibrational hybrid femtosecond/picosecond CARS. Beginning with the general model of ultrashort-pulse CARS, the spectra with different input field parameters are simulated. To analyze the temperature measurement error brought by the input field impacts, the spectra are fitted and compared to fits, with the model neglecting the influence introduced by the input fields. The results demonstrate that, however the input pulses are depicted, temperature errors still would be introduced during an experiment. With proper field characterization, however, the significance of the error can be reduced.