4TH-HARMONIC GENERATION OF PICOSECOND GLASS-LASER PULSES WITH CESIUM LITHIUM BORATE CRYSTALS

We report the fourth-harmonic generation of 1.5 ps, 1.053 mu m glass l aser pulses, where group velocity mismatch plays a significant role, a t intensities up to 100 GW/cm(2) using newly developed crystal, cesium lithium berate (CsLiB6O10). Type-I doubler and type-I quadrupler were used in the fourth harmonic generation experimental scheme. Energy co nversion efficiencies of 24% and 53% have been achieved for frequency quadrupling and doubling of the fundamental glass laser pulses, respec tively. (C) 1996 American Institute of Physics.