| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique which is capable of reducing insertion loss when light is incident from a slab waveguide to an arrayed waveguide or light is incident from an arrayed waveguide to a slab waveguide, without increasing circuit scale and complexity of circuit design and manufacturing. <P>SOLUTION: An optical waveguide includes a slab waveguide 1 having a diffraction grating GP formed therein at a distance from end parts thereof and an arrayed waveguide 2 having an end part connected to an end part of the slab waveguide 1 where a light interference component of a self-image SP of the diffraction grating GP is formed. An arrayed waveguide diffraction grating includes a first I/O waveguide, the optical waveguide of which the end part of the slab waveguide 1 opposite to the arrayed waveguide 2 is connected to an end part of the first I/O waveguide, a second slab waveguide connected to the end part of the arrayed waveguide 2 opposite to the slab waveguide 1, and a second I/O waveguide connected to the end part of the second slab waveguide opposite to the arrayed waveguide 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
