Optimising hybrid rotational femtosecond/picosecond coherent anti-Stokes Raman spectroscopy (HR-CARS) in nitrogen at high pressures and temperatures

Torge Mecker, Trevor Courtney, Brian Patterson, David Escofet-Martin, Brian Peterson, Christopher Kliewer, Mark Linne

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We demonstrate the use of hybrid rotational femtosecond/picosecond (fs/ps) coherent anti-Stokes Raman spectroscopy (HR-CARS) as a technique for temperature measurements in nitrogen gas at high pressures and temperatures. A broadband pulse shaper-adjusted 42 fs pulse interacts with a narrow-bandwidth, frequency-upconverted 5.5 ps pulse in a cell containing N2 at pressures of 1-70 atm and temperatures of 300-1000 K. A computational code is used to model spectra and fit experimental results to obtain best fit temperatures. We demonstrate good qualitative fits as well as good accuracy and precision between thermocouple measured and best-fit temperatures over the explored pressure and temperature regimes. The overall average percentage temperature difference between thermocouple measurements and best-fit
temperatures is -0.3% with a standard deviation of 7.1%, showing the suitability of HR-CARS for characterising high pressure and temperature environments.
Original languageEnglish
Pages (from-to)1035-1046
JournalJournal of the Optical Society of America B
Volume37
Issue number4
Early online date11 Mar 2020
DOIs
Publication statusE-pub ahead of print - 11 Mar 2020

Keywords / Materials (for Non-textual outputs)

  • nonlinear optics
  • laser diagnostics

Fingerprint

Dive into the research topics of 'Optimising hybrid rotational femtosecond/picosecond coherent anti-Stokes Raman spectroscopy (HR-CARS) in nitrogen at high pressures and temperatures'. Together they form a unique fingerprint.

Cite this