Single-beam coherent anti-Stokes Raman scattering spectroscopy of N2 using a shaped 7 fs laser pulse

Roy, Sukesh; Wrzesinski, Paul; Pestov, Dmitry; Gunaratne, Tissa; Dantus, Marcos; Gord, James R.
August 2009
Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p074102
Academic Journal
The feasibility is explored by single-beam coherent anti-Stokes Raman scattering (CARS) spectroscopy of gas-phase diatomic molecules related to combusting flows, with implications for gas-phase thermometry. We demonstrate CARS of gas-phase N2 using a shaped ∼7 fs laser pulse, investigate the dependence of the CARS signal on the total pressure of the probed environment, both in pure N2 and in mixtures with Ar, discuss the observed signal-to-noise ratio, and suggest improvements to be considered for reliable single-shot measurements at flame temperatures.


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