Patent ID: 6836594
Filing Date: 2004-12-28
Classification: G02B,H04J

Abstract:
An array waveguide grating comprising:a predetermined substrate; a first channel waveguide comprising a first plurality of component waveguides and a second channel waveguide comprising a second plurality of component waveguides for light wave transfer on the substrate; a channel waveguide array comprising a third plurality of component waveguides having lengths progressively increasing with a predetermined difference between adjacent ones of the waveguides on the substrate; a first slab waveguide for connecting ends of the first channel waveguides and one end of each component waveguide of the channel waveguide array via a waveguide part having a first shape on the substrate; and a second slab waveguide for connecting one end of the second channel waveguides and the other end of each component waveguide of the channel waveguide array via a waveguide part having a second shape on the substrate; wherein at least one of said first shape and said second shape includes a flaring in an exponential function shape toward the channel waveguide array.