A ferroelectric-domain-inverted grating was fabricated by electron beam scanning in LiNbO3. A waveguide second harmonic generation (SHG) device with the grating was fabricated and demonstrated for the first time. The experiments were performed using a CW-Nd : YAG laser, and normalised SHG conversion efficiency of 50%/W was obtained.
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Fujimura et al. (1992) studied this question.
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