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

Date
2012-02-28
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Source Title
Physica B: Condensed Matter
Print ISSN
0921-4526
Electronic ISSN
Publisher
Elsevier
Volume
407
Issue
20
Pages
4043 - 4047
Language
English
Type
Conference Paper
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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.

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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
Citation
Published Version (Please cite this version)