Abstract

Waveguides were inscribed into a 9.5 mm long periodically poled ${\mathrm{KTiOPO}}_4$ crystal with a Ti:sapphire femtosecond-laser. Waveguiding was achieved between two parallel written tracks with spacings of 17–19 μm. The fundamental power of 1.6 W for frequency doubling in the waveguide was delivered by a continuous wave Ti:sapphire laser at a wavelength of 943.18 nm. A maximum output power of 76 mW in the blue spectral region was achieved. This corresponds to a single pass normalized conversion efficiency of $4.6\%{\mathrm{W}}^{-1}{\mathrm{cm}}^{-2}$.

© 2014 Optical Society of America

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