| 摘要 |
An optical wavelength multiplexer/demultiplexer has an input channel waveguide for receiving a wavelength division multiplexed signal, a first slab waveguide having an input boundary and a fan-shaped output boundary, an arrayed-waveguide grating comprising N channel waveguides, which provides a predetermined waveguide length difference from each other, a second slab waveguide having a fan-shaped input boundary and an output boundary, N output channel waveguides for each receiving a demultiplexed optical signals having a desired wavelength lambda 1, lambda 2, . . . or lambda n. The channel waveguides of the arrayed-waveguide grating are arranged along the fan-shaped output boundary of the first slab waveguide such that an angle theta between the central axis of "i"th (i=1, 2, . . . N) channel waveguide and the symmetric axis of the fan-shaped output boundary of the first slab waveguide 4 satisfies the certain equations.
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