Krishna Yedhu, Tang Hao, Elbaz Ayman M, Magnotti Gaetano
Opt Lett. 2019 Sep 1;44(17):4091-4094. doi: 10.1364/OL.44.004091.
A 10-kHz one-dimensional Rayleigh-CH Raman instrument capable of achieving highly precise measurement of temperature and methane mole fraction is demonstrated. The system uses a pulse-burst laser as the light source and back-illuminated electron-multiplied CCD cameras as the detectors. The cameras are operated in the subframe burst gating mode, to combine a high sampling rate, low noise, and a slow readout. The improved precision of this configuration is demonstrated by measuring temperature and methane mole fractions in ambient temperature gas mixtures and in a non-premixed inverse diffusion flame.
展示了一种能够实现温度和甲烷摩尔分数高精度测量的10kHz一维瑞利-拉曼仪器。该系统使用脉冲串激光器作为光源，背照式电子倍增电荷耦合器件相机作为探测器。相机工作在子帧脉冲选通模式下，以结合高采样率、低噪声和慢读出。通过测量环境温度气体混合物和非预混反向扩散火焰中的温度和甲烷摩尔分数，证明了这种配置的精度有所提高。
