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ESTIMATION OF SPATIAL AVERAGING OF TEMPERATURES FROM COHERENT ANTI-STOKES RAMAN SPECTROSCOPY

机译:从相干抗斯托克斯拉曼光谱估计温度的空间平均

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摘要

Spatial averaging is a potential problem in the application of coherent anti-Stokes Raman spectroscopy (CARS) to combustion diagnostics when varying temperatures and composition are present at spatial scales smaller than the typical 1-2-mm spatial resolution of CARS. The observed CARS spectrum is then a mixture of the hot and cold components. We show that simulated, spatially averaged spectra, generated by the incoherent addition of intensities, can be significantly different from those obtained by the coherent addition of the electric held amplitudes of the component spectra. The analyses of these simulated, spatially averaged CARS spectra demonstrate that the use of theoretical CARS spectra, generated by the addition of intensities of the hot and cold components of a binary gas mixture, can lead to errors in the estimated flame temperatures. (C) 1996 Optical Society of America [References: 13]
机译:当以小于CARS的典型1-2-mm空间分辨率的空间尺度存在变化的温度和成分时,空间平均是将相干反斯托克斯拉曼光谱法(CARS)应用于燃烧诊断的潜在问题。然后,观察到的CARS光谱是热成分和冷成分的混合物。我们表明,通过强度的非相干加法生成的模拟的,空间平均的光谱可能与通过组分光谱的电保持振幅的相干加法获得的模拟光谱显着不同。对这些模拟的,空间平均的CARS光谱进行的分析表明,使用通过添加二元气体混合物的冷热成分强度而生成的理论CARS光谱会导致估计的火焰温度出现误差。 (C)1996年美国眼镜学会[参考文献:13]

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