Abstract

Over $100\mathrm{\mu W}$ of continuous-wave tunable ultraviolet radiation at $370\mathrm{nm}$ is generated by the sum- frequency mixing of radiation from two extended-cavity laser diodes having powers of $60\mathrm{mW}$ at $822\mathrm{nm}$ and $8\mathrm{mW}$ at $671\mathrm{nm}$ in a lithium iodate crystal. The crystal is placed in an external cavity that enhances the powers of two fundamental beams simultaneously by approximately 40. This light source is successfully applied to the laser cooling of trapped ytterbium ions.

© 2010 Optical Society of America

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