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Single-beam coherent anti-Stokes Raman scattering spectroscopy of using a shaped 7 fs laser pulse
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Image of FIG. 1.

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FIG. 1.

Spectrum of the 7 fs laser beam and the CARS signal. In the left inset, the phase and polarization masks are shown; and correspond to orthogonal polarizations. In the right inset, the temporal profiles of the excitation and probe parts of the beam are shown along with their overlap.

Image of FIG. 2.

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FIG. 2.

Room temperature CARS spectra of for two spectral bandwidths of the probe pulse.

Image of FIG. 3.

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FIG. 3.

Single-beam femtosecond-CARS signal as a function of pressure. Symbols represent experimental data points; solid lines represent power curves fit through the data points. Three sets of data are shown to illustrate the repeatability of the observed signal dependence on the number density of .

Image of FIG. 4.

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FIG. 4.

Femtosecond-CARS signal of gas-phase in mixtures with Ar at total cell pressures of one bar and eight bar. The solid and dashed lines represent the power curves fit through the data points.

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/content/aip/journal/apl/95/7/10.1063/1.3207829
2009-08-17
2014-04-16

Abstract

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 using a shaped laser pulse, investigate the dependence of the CARS signal on the total pressure of the probed environment, both in pure 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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Scitation: Single-beam coherent anti-Stokes Raman scattering spectroscopy of N2 using a shaped 7 fs laser pulse
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/7/10.1063/1.3207829
10.1063/1.3207829
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