Acousto-optically modulated quantum cascade laser for high-temperature reacting systems thermometry
Acousto-optically modulated quantum cascade laser for high-temperature reacting systems thermometry
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DOI：
10.1364/ol.44.001435
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发表时间：
2019-03-15
期刊：
影响因子：
3.6
通讯作者：
Vasu, Subith S.
中科院分区：
文献类型：
--
作者：
Loparo, Zachary E.;Ninnemann, Erik;Vasu, Subith S.
我们使用单个声光调制量子级联激光器，在1000-1800K的温度范围内，在2.0-2.9atm和7.6-10.7atm两个压力范围内，以高达250 kHz的速率，在1000-1800K的温度范围内测量了一氧化碳混合物的时间分辨温度，其中红外输出范围为1975-2260 cm(-1)。测量的温度与理想激波关系确定的值非常吻合，反射激波通过后的温度分布被等熵压缩假设很好地模拟。使用这种装置进行的温度测量在很大程度上不受发射和光束控制的影响，使该诊断系统非常适合于研究高能材料的高温气相反应，如octahydro-1，33，7-tetranitro-1，3，5，7-tetrazocine和六氢-1，3，5-三硝基-1，3，5-三嗪。(C)2019年美国光学学会
We demonstrate time-resolved temperature measurements in shock-heated mixtures of carbon monoxide over a temperature range of 1000-1800 K for two pressure ranges, 2.0-2.9 atm and 7.6-10.7 atm, at rates up to 250 kHz using a single acousto-optically modulated quantum cascade laser with mid-infrared output spanning from 1975 to 2260 cm(-1). Measured temperatures were in excellent agreement with values determined by ideal shock relations, and the temperature profile after the passage of the reflected shock wave was found to be well-modeled by an isentropic compression assumption. Temperature measurements made with this setup are largely immune to effects of emissions and beam steering, making the diagnostic system well-suited for studying high-temperature gas-phase reactions of energetic materials such as octahydro-1,33,7-tetranitro-1,3,5,7-tetrazocine and hexahydro-1,3,5-trinitro-1,3,5-triazine. (C) 2019 Optical Society of America