Patent ID: 6768832
Filing Date: 2004-07-27
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 and which include a shortest channel waveguide having a shortest length; a second slab waveguide; a plurality of second optical waveguides connected to said arrayed waveguide via said second slab waveguide; and each of the plurality of channel waveguides including first and second connection portions and a curved portion provided between the first and second connection portions, the first connection portion being connected to the first slab waveguide, the second connection portion being connected to the second slab waveguide, the shortest channel waveguide having a radius (R1) of curvature of the curved portion and an angle (&thgr;1) which is a half of a central angle of the curved portion, the radius (R1) of curvature and the angle (&thgr;1) being determined such that a product (R1Ã—&thgr;1) of the radius (R1) of curvature and the angle (&thgr;1) is a value within a range which includes a minimum value of the product (R1Ã—&thgr;1) and in which all of the plurality of channel waveguides are drawn.