GENERATION OF FEMTOSECOND LIGHT-PULSES IN THE UV AND VISIBLE SPECTRALREGIONS IN STIMULATED RAMAN-SCATTERING IN COMPRESSED GASES

Stimulated Raman scattering (SRS) in compressed H-2, D-2, HD, and CH4 gases excited by pulses of the second harmonic of radiation of a titan ium-doped sapphire laser (390 nm) with duration of 300 fs and energy o f up to 100 mu J is studied. The results of these studies offer promis e for the use of SRS in compressed gases for the conversion of radiati on of femtosecond pulses with the feasibility of choosing frequency sh ifts in the range from 150 to 4155 cm(-1). The analysis of SRS spectra shows that the self-action phenomena, which cause the depletion of ef fective power of pump radiation because of a manyfold broadening of it s spectrum, are of substantial importance.