  This article describes a high-power and narrow-linewidth laser source at 399
nm useful for cooling and trapping of ytterbium atoms. A continuous-wave
titanium-sapphire laser at 798 nm is frequency doubled using a lithium
triborate crystal in an enhancement cavity. Up to 1.0 W of light at 399 nm has
been obtained from 1.3 W of infrared light, with an efficiency of 80 %
  This paper was published in Applied Optics and is made available as an
electronic reprint with the permission of OSA. The paper can be found at the
following URL on the OSA website:
http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-53-16-3388. Systematic or
multiple reproduction or distribution to multiple locations via electronic or
other means is prohibited and is subject to penalties under law.
