title: Optical interleavers based on two-dimensional photonic crystals.
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.
authors.affiliation: Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, 807, Taiwan. ydwu@cc.kuas.edu.tw
authors.forename: Yaw-Dong
authors.initials: YD
authors.lastname: Wu
authors.forename: Min-Lin
authors.initials: ML
authors.lastname: Huang
authors.forename: Tien-Tsorng
authors.initials: TT
authors.lastname: Shih