Journal
APPLIED PHYSICS LETTERS
Volume 114, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5071438
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Funding
- United States Department of Energy's Office of Science Early Career Research Program
- Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- EPSRC [EP/P001661/1, EP/P020593/1] Funding Source: UKRI
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We demonstrate hybrid femtosecond/picosecond (fs/ps) pure-rotational coherent anti-Stokes Raman spectroscopy (RCARS) at high temperatures and pressures. Pulse-shaper-produced 40 fs pulses and bandwidth-narrowed, frequency-upconverted 5 ps pulses interact in a high-pressure cell containing N2 at 1-70 atm and 300-1000 K. Accurate experimental temperatures evaluated from fits to model rotational spectra confirm that the sensitivity and precision advantages of hybrid fs/ps RCARS can be exploited in characterizing combustion environments, even in the pressure regime where significant collisional energy transfer and line broadening cannot be neglected. Published under license by AIP Publishing.
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