Abstract

Direct measurements of CO2 S-branch Raman coherence-decay lifetimes resulting from CO2O2, CO2Ar, and CO2C2H4 collisions by employing time-resolved picosecond rotational coherent anti-Stokes Raman scattering (CARS) spectroscopy are reported. Based on the measured Raman coherence dephasing rates, the corresponding Raman linewidths of various J levels are obtained. Our measured linewidth data will aid CO2 CARS fitting, which is applied to the high-accuracy extraction of temperature and species concentration information from CARS spectra.

© 2019 Optical Society of America

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