Periodic electric field assisted poling of low-loss (∼0.1 dB/cm) singlemode Ti-diffused channel waveguides in MgO(5 mol%):LiNbO3has been achieved for the first time using a periodically patterned metal electrode under vacuum conditions and a homogeneous liquid ground electrode at atmospheric pressure. Using selective chemical etching, the periodic (Λ∼17 µm) domain inverted structure is confirmed.
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Lee et al. (2002) studied this question.
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