SPECTRAL FEATURES OF RAMAN SCATTERING AND FLUORESCENCE SEA WATER INDUCED BY FEMTOSECOND LASER PULSES

摘要

The spectral bands shape of sea water Raman scattering and laser induced fluorescence of chlorophyll A were experimentally investigated when scattering and fluorescence induced by the different wavelength and duration of laser radiation. The femtosecond laser pulses with 400, 480, 500 run of wavelength, nanosecond impulse (532 nm) and continuous laser radiation (527 nm and 400 nm) were used in these experiments. The spectral line shape of the sea water Raman scattering is Gauss function corresponding to the symmetrical vibrations (ν_1) when femtosecond laser pulses were used. Maxima corresponding to the Fermi resonance (2ν_2) and antisymmetric vibrations (ν_3) were not detected.