An improved CARS spectrometer for single‐shot measurements in turbulent combustion

摘要: A broadband coherent anti‐Stokes Raman spectroscopy (CARS) system optimized for single shot measurements in turbulent flames is described. The CARS spectrometer incorporates an intensified photodiode array (IPDA) with a P46‐phosphor based intensifier that shown to have order of magnitude less image persistence than P20‐phosphor IPDAs, and thus largely eliminates the temperature errors can result from this persistence. low high signal nonlinearity IPDAs incorporating both P20 P46 phosphor intensifiers dispersed element concave holographic diffraction grating, which fiber‐optically coupled. To provide necessary dynamic range (approximately 1000:1) handle spectra whose temperatures vary 300 K adiabatic flame fiber‐optic splitter was employed IPDA detectors characterized. method determining developed convenient a...