Hybrid femtosecond/picosecond pure rotational anti-Stokes Raman spectroscopy of nitrogen at high pressures (1-70 atm) and temperatures (300-1000 K)

Trevor Courtney, Nils Mecker, Brian Patterson, Mark Linne, Christopher Kliewer

Research output: Contribution to journalArticlepeer-review

Abstract

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 line-mixing and collisional energy transfer cannot be neglected.
Original languageEnglish
JournalApplied Physics Letters
Volume114
Early online date15 Mar 2019
DOIs
Publication statusE-pub ahead of print - 15 Mar 2019

Keywords

  • Nonlinear optics
  • CARS

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