Dunn-Rankin D, Switzer G L, Obringer C A, Jackson T A
Appl Opt. 1990 Jul 20;29(21):3150-9. doi: 10.1364/AO.29.003150.
This research examines the potential for coherent anti-Stokes Raman scattering (CARS) to provide reliable gas temperature measurements in the presence of liquid droplets. The droplets cause dielectric breakdown by focusing the CARS laser beams. This breakdown produces a plasma that can disrupt or obscure the CARS signal. Specifically, we examine the influence of laser induced breakdown on the CARS signal, and we determine the importance of droplet position relative to the CARS focal volume and droplet concentration on the reliability of CARS temperature measurements in droplet-laden flows. In addition, we propose a reliable data reduction procedure to minimize the disruptive influence of laser induced breakdown on CARS temperatures.
本研究探讨了相干反斯托克斯拉曼散射（CARS）在存在液滴的情况下提供可靠气体温度测量的潜力。液滴通过聚焦CARS激光束导致介电击穿。这种击穿产生的等离子体可能会干扰或掩盖CARS信号。具体而言，我们研究了激光诱导击穿对CARS信号的影响，并确定了液滴相对于CARS焦体积的位置以及液滴浓度对含液流中CARS温度测量可靠性的重要性。此外，我们提出了一种可靠的数据处理程序，以尽量减少激光诱导击穿对CARS温度的干扰影响。
