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Application filed by Hitachi Chemical Co LtdfiledCriticalHitachi Chemical Co Ltd
Publication of TW200535475ApublicationCriticalpatent/TW200535475A/en
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Publication of TWI255929BpublicationCriticalpatent/TWI255929B/en
An optical waveguide can reduce the light loss due to mis-alignment of the central axis of a light transmission mode in a curved optical waveguide and the central axis of the optical waveguide. The optical waveguide has a curved part, and when a shortest distance from a prescribed position in the outer edge of the curved part to the inner edge of the curved part is took as an optical waveguide width at the prescribed position, the optical waveguide width is set to be gradually decreased, from a largest optical waveguide width at a middle position of the curved part, toward two side edges of the curved part.