Abstract

We have generated continuous-wave single-frequency 1.5W 378nm radiation by frequency doubling a high-power Ti:sapphire laser in an external enhancement cavity. An LBO crystal that is Brewster-cut and antireflection coated on both ends is used for a long-term stable frequency doubling. By optimizing the input coupler’s reflectivity, we could generate 1.5W 378nm radiation from a 5W 756nm Ti:sapphire laser. According to our knowledge, this is the highest CW frequency-doubled power of a Ti:sapphire laser.

© 2010 Optical Society of America

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