Dual-frequency division de-multiplexer based on cascaded photonic crystal waveguides

Date

2012-02-28

Authors

Akosman, Ahmet E.
Mutlu, Mehmet
Kurt, H.
Özbay, Ekmel

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Abstract

A dual-frequency division de-multiplexing mechanism is demonstrated using cascaded photonic crystal waveguides with unequal waveguide widths. The de-multiplexing mechanism is based on the frequency shift of the waveguide bands for the unequal widths of the photonic crystal waveguides. The modulation in the waveguide bands is used for providing frequency selectivity to the system. The slow light regime of the waveguide bands is utilized for extracting the desired frequency bands from a wider photonic crystal waveguide that has a relatively larger group velocity than the main waveguide for the de-multiplexed frequencies. In other words, the wider spatial distribution of the electric fields in the transverse direction of the waveguide for slow light modes is utilized in order to achieve the dropping of the modes to the output channels. The spectral and spatial de-multiplexing features are numerically verified. It can be stated that the presented mechanism can be used to de-multiplex more than two frequency intervals by cascading new photonic crystal waveguides with properly selected widths.

Source Title

Physica B: Condensed Matter

Publisher

Elsevier

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Keywords

De-multiplexer, Optical communication, Photonic crystal, Slow light, De-multiplexer, Dual frequency, Frequency intervals, Frequency selectivity, Frequency shift, Group velocities, Light regime, Output channels, Photonic crystal waveguide, Transverse directions, Electric fields, Frequency bands, Laser optics, Multiplexing, Multiplexing equipment, Optical communication, Photonic crystals, Slow light, Waveguides, Optical waveguides

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Citation

Published Version (Please cite this version)

Language

English

Type

Conference Paper