Steinmetz S A, Kliewer C J
Opt Express. 2020 Nov 9;28(23):34586-34596. doi: 10.1364/OE.405517.
Coherent anti-Stokes Raman scattering (CARS) is a valuable spectroscopic tool for the measurement of temperature and species concentration. In recent years, multi-dimensional CARS has seen focused development and is especially important in reacting flows. An important aspect of multi-dimensional CARS is the phase-matching scheme used. Historically, collinear and BOXCARS phase-matching schemes have been used to achieve phase matching over a broad spectral range. For 1-D and 2-D CARS imaging, two-beam or counter-propagating beam arrangements are necessary. The two-beam arrangement offers many advantages, but introduces a phase mismatch which limits the spectral response of the measurement. This work explores the tradeoffs in spatial resolution, spectral bandwidth, and CARS intensity in 2-D CARS arrangements. Calculations are made for two-beam and counter-propagating beam CARS.
相干反斯托克斯拉曼散射（CARS）是用于测量温度和物种浓度的一种有价值的光谱工具。近年来，多维CARS得到了重点发展，并且在反应流中尤为重要。多维CARS的一个重要方面是所使用的相位匹配方案。从历史上看，共线和BOXCARS相位匹配方案已被用于在宽光谱范围内实现相位匹配。对于一维和二维CARS成像，需要两束光或反向传播光束的布置。两束光的布置具有许多优点，但会引入相位失配，这限制了测量的光谱响应。这项工作探讨了二维CARS布置在空间分辨率、光谱带宽和CARS强度方面的权衡。对两束光和反向传播光束的CARS进行了计算。
