Patent ID: 6690861
Filing Date: 2004-02-10
Classification: G02B

Abstract:
An arrayed waveguide grating comprising:one or more input waveguides; an input side slab-waveguide connected to the output side of the input waveguide or waveguides; a plurality of arrayed waveguides formed on the side of the input side slab-waveguide opposite the input waveguide or waveguides; an output side slab-waveguide connected to the other terminal of the arrayed waveguides; a plurality of first output waveguides connected to the output side slab-waveguide on the side thereof opposite the arrayed waveguides; and at least one second output waveguide formed together with the first output waveguides on the side of the output side slab-waveguide opposite the arrayed waveguides; the afore-said components being all formed on a substrate and the second output waveguide outputting an optical spectrum different from the optical spectral outputted from the other output waveguides.