G. Grimefeld et al., INTERFERENCE-FREE UV-LASER-INDUCED RAMAN AND RAYLEIGH MEASUREMENTS INHYDROCARBON COMBUSTION USING POLARIZATION PROPERTIES, Applied physics. B, Lasers and optics, 61(5), 1995, pp. 473-478
It is demonstrated that precise spontaneous Raman scattering measureme
nts with deep-UV lasers are in principle possible in hydrocarbon flame
s - even with liquid fuels - by the use of polarization properties. In
contrast to the highly polarized Raman emission, the strong interferi
ng broadband emission from combustion intermediates is unpolarized. Su
btracting the emission intensities for the electric vector of the lase
r light perpendicular and parallel to the direction of observation all
ows to extract the pure Raman signals. Different applications of this
technique are discussed.