Abstract

An ultrasmall device size optical interleaver based on directional coupler waveguides in two-dimensional photonic crystals (PCs) is proposed. The numerical results show that the proposed PCs waveguide structure could really function as an interleaver with the central wavelength 1550  nm and the channel spacing 0.8  nm (frequency spacing of 100  GHz) of the dense wavelength division multiplexing (DWDM) specification. It can be widely used as the wavelength selective element for multiplexer–demultiplexer to lower or raise channel densities in DWDM optical fiber communication systems.

© 2007 Optical Society of America

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