GENERATION OF UV AND VIS LASER-LIGHT BY STIMULATED RAMAN-SCATTERING IN H-2, D-2, AND H-2 HE USING A PULSED ND-YAG LASER AT 355 NM/

The stimulated Raman scattering (SRS) technique has been used for upwa rd and downward shifting of the third harmonic of a pulsed Nd:YAG lase r (10-105 mJ at 355 nm) into the 274-503 nm wavelength region. Experim ental results on Stokes and anti-Stokes conversion efficiencies of the for ward SRS in hydrogen (H-2), deuterium (D-2), and mixtures of hydr ogen and helium (H-2/He), versus Raman gas pressure and input pump ene rgy of the pulsed Nd:YAG laser at 355 nm, are reported. Photon convers ion efficiencies of 50% and 27% are achieved at the first Stokes lines (S-1) in H-2 and D-2, respectively. As a result, ultraviolet and visi ble laser light (274-503 nm) was generated with energies ranging from a few mJ up to several tens of mJ.