NaCl Concentration and Water Temperature Influence on the Rayleigh Wing by Four Photon Polarized Spectroscopy

The hypersonic lattice resulted from the interaction of reference wave with the scattering medium leads to the anizotropic scattering nonlinear cubic susceptibility modulation and the formation of maxima in the Rayleigh wing displaced from each other to the Brillouin frequency in the range from -2 cm-1 to 2 cm-1.With the increase of NaCl concentration and water temperature it is observed the growth of water adiabatic compressibility and hence the increase of Brillouin threshold and the decrease of the anizotropic scattering nonlinear cubic susceptibility modulation degree. With the modulation degree decrease the side maxima amplitude deminishes and is not registrated by the set. This result in the Rayleigh wing narrowing obtained by four photon polarized spectroscopy.

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