Direct and cascaded third harmonic generation in CsLiB/sub 6/O/sub 10/ crystals

We investigated the single step third harmonic generation in CsLiB/sub 6/O/sub 10/ (CLBO) crystals for the first time. Since CLBO crystals, like BBO, possess excellent properties for UV generation, they are good candidates for the single step third harmonic generation. We used a pulsed Nd:YAG laser as a light source, which operates with the pulse width of 9 ns and the repetition rate of 10 Hz. Excellent quality crystals of CLBO have been grown from supercooled melts at constant temperature in the authors' laboratory. The crystal was cut and polished so that the effective /spl chi//sup 3/ may have the maximum value for type I phase-matching configuration.