Hübner M, Welzel S, Marinov D, Guaitella O, Glitsch S, Rousseau A, Röpcke J
INP Greifswald, Felix-Hausdorff-Str. 2, D-17489 Greifswald, Germany.
Rev Sci Instrum. 2011 Sep;82(9):093102. doi: 10.1063/1.3633952.
A compact and transportable three channel quantum cascade laser system (TRIPLE Q) based on mid-infrared absorption spectroscopy has been developed for time-resolved plasma diagnostics. The TRIPLE Q spectrometer encompasses three independently controlled quantum cascade lasers (QCLs), which can be used for chemical sensing, particularly for gas phase analysis of plasmas. All three QCLs are operated in the intra-pulse mode with typical pulse lengths of the order of 150 ns. Using a multiplexed detection, a time resolution shorter than 1 μs can be achieved. Hence, the spectrometer is well suited to study kinetic processes of multiple infrared active compounds in reactive plasmas. A special data processing and analysis technique has been established to account for time jitter effects of the infrared emission of the QCLs. The performance of the TRIPLE Q system has been validated in pulsed direct current plasmas containing N(2)O/air and NO(2)/air.
一种基于中红外吸收光谱的紧凑便携三通道量子级联激光系统（TRIPLE Q）已被开发用于时间分辨等离子体诊断。TRIPLE Q光谱仪包含三个独立控制的量子级联激光器（QCL），可用于化学传感，特别是用于等离子体的气相分析。所有三个QCL均以脉冲内模式运行，典型脉冲长度约为150 ns。采用多路复用检测，可实现短于1 μs的时间分辨率。因此，该光谱仪非常适合研究反应性等离子体中多种红外活性化合物的动力学过程。已建立一种特殊的数据处理和分析技术来考虑QCL红外发射的时间抖动效应。TRIPLE Q系统的性能已在含有N(2)O/空气和NO(2)/空气的脉冲直流等离子体中得到验证。
