Patent ID: 6501882
Filing Date: 2002-12-31
Classification: G02B

Abstract:
An arrayed waveguide grating optical multiplexer/demultiplexer comprising:at least one first optical waveguide; 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 expanding width waveguide having a first end portion and a second end portion, 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 expanding width waveguide being connected to each of said at least one first optical waveguide, the second end portion being connected to said first slab waveguide, the first width of the first end portion being larger than a first optical waveguide width of said at least one first optical waveguide, the first width of said first end portion satisfying a single mode condition, a width of said at least one expanding width waveguide increasing from the first end portion toward the second end portion.