title: 100-kHz-rate gas-phase thermometry using 100-ps pulses from a burst-mode laser.
abstract: Temperature measurements based on gas-phase coherent anti-Stokes Raman scattering (CARS) spectroscopy are demonstrated in reacting flows at a rate of 100 kHz employing a burst-mode laser with a pulse duration of ∼100  ps. The recently developed picosecond-duration, high-energy burst-mode laser is used to pump an optical parametric generator/optical parametric amplifier that produces broadband light centered at ∼680  nm to provide the Stokes beams for excitation of the rovibrational Raman transitions of H(2). The 532-nm output of the picosecond burst-mode laser is then utilized as a pump beam for the CARS process that generates 100 single-shot spectra at a rate of 100 kHz during the 1-ms duration burst. Coherent spectroscopy-based temperature measurements at 100 kHz will significantly aid the understanding of transient and unsteady flow phenomena related to turbulent combustion, transonic and hypersonic flows, high-enthalpy flows, and the dynamics of energetic materials.
authors.forename: Sukesh
authors.initials: S
authors.lastname: Roy
authors.forename: Paul S
authors.initials: PS
authors.lastname: Hsu
authors.forename: Naibo
authors.initials: N
authors.lastname: Jiang
authors.forename: Mikhail N
authors.initials: MN
authors.lastname: Slipchenko
authors.forename: James R
authors.initials: JR
authors.lastname: Gord