Patent ID: 6728435
Filing Date: 2004-04-27
Classification: G02B

Abstract:
An arrayed waveguide grating optical multiplexer/demultiplexer comprising:a plurality of first optical waveguides; a first slab waveguide; an arrayed waveguide connected to said at least one first optical waveguide via said first slab waveguide, said arrayed waveguide comprising a plurality of channel waveguides each of which has a different length; a second slab waveguide; a plurality of second optical waveguides connected to said arrayed waveguide via said second slab waveguide; and at least one multi-mode waveguide having a first end portion and a second end portion, at least one of the plurality of first optical waveguides being connected to said first slab waveguide without interposing said multi-mode waveguide, each of others of the plurality of first optical waveguides being connected to said first slab waveguide via each of said multi-mode waveguide, a second width of the second end portion being larger than a first width of the first end portion, the first end portion of each of said at least one multi-mode waveguide being connected to each of said others of the plurality of first optical waveguides, the second end portion of each of said at least one multi-mode waveguide being connected to said first slab waveguide, a width of said at least one multi-mode waveguide increasing from the first end portion toward the second end portion and being configured to realize multi-mode.