Open AccessDirect measurement of CO2S-branch Raman linewidths broadened by O2, Ar, and C2H4
Author(s) -
Naibo Jiang,
Sukesh Roy,
Paul S. Hsu,
James R. Gord
Publication year - 2019
Publication title -
applied optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 197
eISSN - 2155-3165
pISSN - 1559-128X
DOI - 10.1364/ao.58.000c55
Subject(s) - raman spectroscopy , dephasing , laser linewidth , raman scattering , picosecond , coherent anti stokes raman spectroscopy , materials science , optics , coherence (philosophical gambling strategy) , analytical chemistry (journal) , atomic physics , physics , laser , chemistry , condensed matter physics , chromatography , quantum mechanics
Direct measurements of CO 2 S -branch Raman coherence-decay lifetimes resulting from CO 2 - O 2 , CO 2 - Ar , and CO 2 - C 2 H 4 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 CO 2 CARS fitting, which is applied to the high-accuracy extraction of temperature and species concentration information from CARS spectra.