Patent ID: 7400800
Filing Date: 2008-07-15
Classification: G02B

Abstract:
1. An arrayed waveguide grating type optical multiplexer/demultiplexer circuit, comprising on a flat substrate a plurality of first optical waveguides, a first slab waveguide which is connected to the first optical waveguides, an arrayed waveguide, connected to the first slab waveguide, consisting of a plurality of optical waveguides which sequentially become longer with a prescribed waveguide length difference, a second slab waveguide which is connected to the arrayed waveguides, and a plurality of second optical waveguides which are connected to the second slab waveguide; further comprising: a parabola waveguide in which a width W of the first optical waveguide contacting with the first slab waveguide is defined by the following equation with respect to a propagation axis Z of optical wave, where, A: a coefficient, and A>0, W and a taper waveguide in which a width W′ of the second optical waveguide contacting with the second slab waveguide is defined by the following equation with respect to a propagation axis Z of optical wave, where, A′: a coefficient, W wherein the length Z where Z