Arrayed waveguide grating, optical module provided with said arrayed waveguide grating, and optical communications system

摘要

An arrayed waveguide grating provided with a first slab waveguide formed on a substrate; a second slab waveguide formed on the substrate; a first input/output waveguide connected to the first slab waveguide; a second input/output waveguide connected to the second slab waveguide; two or more channel waveguide groups connecting the first and second slab waveguides, each of the channel waveguide groups formed of an aggregate of a plurality of channel waveguides having path lengths sequentially becoming longer by a predetermined path length difference; and an optical filter arranged in at least one of the first and second slab waveguides.

主权项

1. An arrayed waveguide grating comprising:
a first slab waveguide formed on a substrate; a second slab waveguide formed on the substrate; a first input/output waveguide connected to the first slab waveguide; a second input/output waveguide connected to the second slab waveguide; two or more channel waveguide groups connecting the first and second slab waveguides, each of the channel waveguide groups formed of an aggregate of a plurality of channel waveguides having path lengths sequentially becoming longer by a predetermined path length difference; and an optical filter arranged in at least one of the first and second slab waveguides, wherein:
the optical filter demultiplexes signal light input from the first input/output waveguide connected to the first slab waveguide or the second input/output waveguide connected to the second slab waveguide, the first or second slab waveguide in which the optical filter is arranged, to the two or more channel waveguide groups for each wavelength band, ormultiplexes the signal light input from the two or more channel waveguide groups for each wavelength band to the first input/output waveguide connected to the first slab waveguide or the second input/output waveguide connected to the second slab waveguide, the first or second slab waveguide in which the optical filter is arranged, and wherein:
the two or more channel waveguide groups have different path lengths differences,each wavelength band has a different wavelength interval of signal light, andthe signal light passes through the two or more channel waveguide groups corresponding to the wavelength band.