ARRAY WAVEGUIDE DIFFRACTION GRATING OPTICAL MULTIPLEXER/DEMULTIPLEXER

摘要

An array waveguide diffraction grating optical multiplexer/demultiplexer comprises an input waveguide, an input-side slab waveguide, an array waveguide diffraction grating, an output-side slab waveguide, and an output waveguide. At the coupling part where the end of the input waveguide and the input-side slab waveguide are coupled, the end of the input waveguide is tapered toward the input-side slab waveguide in the direction of the waveguide width. Two mutually-independent narrow waveguide parts are provided along the extensions of the tapers and spaced from each other, and a wide waveguide part is spaced from the narrow waveguide parts.