MULTI-CHANNEL ARRAY WAVEGUIDE DIFFRACTION GRATING TYPE MULTIPLEXER/DEMULTIPLEXER AND METHOD OF CONNECTING ARRAY WAVEGUIDE WITH OUTPUT WAVEGUIDES

摘要

An array waveguide diffraction grating type optical multiplexer/demultiplexer comprising an input waveguide, an input-side slab waveguide, an output-side slab waveguide, output waveguides, and array waveguides provided between the input-side slab waveguide and the output-side slab waveguide and having sequentially different lengths between adjacent waveguides, wherein the output waveguides are so disposed that angles formed by respective output waveguides and the normals of Rowland circles of the output waveguides gradually increase from the central output waveguide toward the output waveguides at the opposite ends, thereby decreasing the non-symmetry of the pass band of each output waveguide based on the field distribution shape, at a light converging point, of the output-side slab waveguide.