Journal
OPTICS LETTERS
Volume 47, Issue 20, Pages 5429-5432Publisher
Optica Publishing Group
DOI: 10.1364/OL.474037
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Funding
- Division of Chemical Sciences, Geosciences and Biosciences, Office of Basic Energy Sciences (BES), US Department of Energy (USDOE)
- US DOE National Nuclear Security Administration [DE-NA0003525]
- Army Research Office [W911NF-19-2-0243]
- Texas AM University
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Simultaneous measurement of rotational and vibrational temperatures in an N2 plasma using VIPA-CARS technique is demonstrated. VIPA-CARS provides more accurate measurements of non-equilibrium temperatures compared to grating-resolved rotational CARS.
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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