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Opt Lett. 2009 Dec 15;34(24):3857-9. doi: 10.1364/OL.34.003857.

Gas-phase single-shot thermometry at 1 kHz using fs-CARS spectroscopy.

Author information

1
Spectral Energies, LLC, 5100 Springfield Street, Suite 301, Dayton, Ohio 45431, USA. sroy@woh.rr.com

Abstract

Single-laser-shot temperature measurements at a data rate of 1 kHz employing femtosecond coherent anti-Stokes Raman scattering (fs-CARS) spectroscopy of N(2) are demonstrated. The measurements are performed using a chirped-probe pulse to map the time-dependent frequency-spread dephasing of the Raman coherence, which is created by approximately 80-fs pump and Stokes beams, into the spectrum of the coherent anti-Stokes Raman scattering signal pulse. Temperature is determined from the spectral shape of the fs-CARS signal for probe delays of approximately 2 ps with respect to the pump-Stokes excitation. The accuracy and precision of the measurements for the 300-2400 K range are found to be approximately 1%-6% and approximately 1.5%-3%, respectively.

PMID:
20016637

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