Patent ID: 6317534
Filing Date: 2001-11-13
Classification: G02B

Abstract:
An optical wavelength routing device, comprising:an arrayed waveguide comprising a plurality of waveguides formed on a substrate;a plurality of input waveguides located on an input side of said arrayed waveguide on said substrate;a plurality of output waveguides located on an output side of said arrayed waveguide on said substrate;an input slab waveguide for coupling said input waveguides to said arrayed waveguide on said substrate to provide a first coupling portion on a side of said input waveguides; andan output slab waveguide for coupling said arrayed waveguide on said substrate to said output waveguides to provide a second coupling portion on a side of said output waveguides;wherein a wavelength multiplexed optical signal input to one input waveguide of said input waveguides is demultiplexed to be output from said output waveguides as wavelength demultiplexed optical signals in accordance with a wavelength circulating pattern dependent on a position of said one input waveguide, and wavelength division optical signals input to said input waveguides are multiplexed to be output from one output waveguide of said output waveguides as a wavelength multiplexed optical signal; andwherein said input waveguides and said output waveguides are located at said first and second coupling portions with substantially different intervals, respectively, such that a maximum wavelength difference of optical signals output from said output waveguides is shared by a total of a positive wavelength difference thereof and a negative wavelength difference thereof.