200 mW average power UV generation at 0.193 /spl mu/m in K/sub 2/Al/sub 2/B/sub 2/O/sub 7/

Summary form only given. We report the first attainment of UV generation at 0.193 /spl mu/m in KAB. This was achieved by mixing the Nd:YAG laser at 1.0642 /spl mu/m with the SFG output of the RTA OPO tuned to 0.2358 /spl mu/m. The average output power we generated at 0.2358 /spl mu/m was 0.8 W at 10 KHz. Since the polarization direction of the 0.2358 /spl mu/m beam differs 45/spl deg/ from the Nd:YAG laser fundamental beam, a 45/spl deg/ polarization rotator was placed in the Nd:YAG laser beam to coincide with the polarization directions before entering the KAB crystal. The system described has been routinely operating for more than 6 months without any damage to the KAB crystal, thus demonstrating the attractiveness of this material for UV generation below 0.2 /spl mu/m.