Resolved rotation-vibration non-equilibrium with rotational VIPA-CARS

被引：5
|
作者：
Steinmetz, S. A. [1 ]
Chen, T. Y. [1 ]
Goldberg, B. M. [1 ,2 ]
Limbach, C. M. [3 ]
Kliewer, C. J. [1 ]
机构：
[1] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA
[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA
[3] Texas A&M Univ, Aerosp Engn, 3141 TAMU, College Stn, TX 77840 USA
来源：
OPTICS LETTERS | 2022年 / 47卷 / 20期
关键词：
IMAGED PHASED-ARRAY; DYNAMICS;
D O I：
10.1364/OL.474037
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Simultaneous rotational and vibrational temperatures are measured in an N2 plasma with rotational coherent anti -Stokes Raman scattering (CARS) resolved with a virtually imaged phased array (VIPA)-based spectrometer. A VIPA spectrally separates rotational transitions for each vibra-tional state, allowing vibrational populations to be directly measured. VIPA-CARS is shown to provide more accu-rate measurements of non-equilibrium temperatures than grating-resolved rotational CARS. The general character-istics, limitations, and potential uses of VIPA-CARS are discussed. (C) 2022 Optica Publishing Group
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页码：5429 / 5432
页数：4
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