作者: Tetsuya Mori , Kimio Moriya
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摘要: An optical waveguide including a first cladding layer; core layer, and second sections with on sides thereof in the in-layer direction; layer. A refractive index distribution direction from section to an adjacent section, has continuous change region peak, dip, peak this order; at position of maximum value smaller than portion, layer corresponded layer-stacking direction, discontinuously changing boundary between section.