355-nm ultraviolet light generation in high-quality CsB/sub 3/O/sub 5/

We obtained high-quality CsB/sub 3/O/sub 5/ (CBO) crystals grown by the top-seeded solution growth (TSSG) method using high-quality sintered powder. The third harmonic of an Nd:YVO/sub 4/ laser was generated by using a type-II CBO crystal. A 2.9-W 355-nm power at a 31-kHz repetition rate was generated in the crystal, which corresponds to a conversion efficiency of 28% from the fundamental light to the third harmonic.