Effects of N2-CO Polarization Beating on Femtosecond coherent Anti- stokes Raman Scattering Spectroscopy of N2 (POSTPRINT)

摘要

The effects of broadband excitation employing femtosecond laser pulses on the coherent anti-Stokes Raman scattering (CARS) spectroscopy of N2 are investigated. We have previously demonstrated that the dephasing rate of the coherence, established by the impulsive excitation of N2 using femtosecond pump and Stokes beams, can be used for measuring gas-phase temperature in chemically reacting flows. The objective of the current work is to investigate the effects of polarization beating between N2 and CO on the measured gas-phase temperature using time-resolved femtosecond CARS spectroscopy of N2.