Patent ID: 6810167
Filing Date: 2004-10-26
Classification: G02B

Abstract:
A wavelength division demultiplexing apparatus, comprising:a substrate; a first waveguide, disposed on said substrate, for propagating wavelength division multiplexed light having a plurality of wavelength components; a first slab, disposed on said substrate, for diffusing the wavelength division multiplexed light inputted from said first waveguide; a plurality of channel waveguides, disposed on said substrate and having a series of different waveguide lengths increasing with a predetermined difference, for receiving and splitting the wavelength division multiplexed light diffused in said first slab to propagate split light, separately from each other channel waveguide; a second slab, disposed on said substrate, for receiving the split light separately propagated through the plural channel waveguides and condensing the received wavelength division multiplexed light; and a second waveguide, disposed on said substrate, for propagating the light condensed by said second slab therein; said channel waveguides and said first slab being optically connected to each other at a number of nodes greater than the number of nodes at which said channel waveguides and said second slab are connected to each other.