Patent ID: 6434292
Filing Date: 2002-08-13
Classification: G02B

Abstract:
An optical wavelength multiplexer/demultiplexer, comprising:an optical waveguide array including a central waveguide and a plurality of other optical waveguides; a planar waveguide region connected to the optical waveguide array; an arrayed waveguide grating connected to the planar waveguide region; a second planar waveguide region connected to the arrayed waveguide grating; and a second optical waveguide array connected to the second planar waveguide region, and including a second central waveguide and a plurality of further optical waveguides; wherein the central waveguide is formed at a location, on which light transmitted from the arrayed waveguide grating to the planar waveguide region is focused, on an interface between the optical waveguide array and the planar waveguide region; wherein only light multiplexed with a plurality of wavelengths is carried by the central waveguide, and light demultiplexed from a multiplexed light is carried by the other optical waveguides; and wherein the second central waveguide is formed at a location, on which light transmitted from the arrayed waveguide grating to the second planar waveguide region is focused, on an interface between the second optical waveguide array and the second planar waveguide region, and wherein only light multiplexed with a plurality of wavelengths is carried by the second central waveguide, and light demultiplexed from a multiplexed light is carried by the further optical waveguides.