Abstract
It was found that, by heating an LiNbO 3 crystal with SiO 2 cladding on the +z face, ferroelectric-domain inversion is induced under the cladding. The inversion method offers high reproducibility and is suitable for fabrication of quasiphase-matching waveguide SHG devices. A prototype device was fabricated and SHG was demonstrated using a CW-YAG laser
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