Wavelength division multiplexing and demultiplexing with photonic crystal waveguide couplers
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TLDR
In this article, a multiplexer-demultiplexer (MUX-DEMUX) based on photonic crystal (PC) waveguide couplers is proposed.Abstract:
A multiplexer-demultiplexer (MUX-DEMUX) based on PC waveguide couplers is proposed, and its wavelength demultiplexing properties are theoretically investigated. First, a two-channel MUX-DEMUX is designed and characterized, and then, by cascading, two stages of photonic crystal (PC) waveguide couplers with different coupling coefficients are constructed. The device sizes are expected to be drastically reduced from a scale of a few tens of micrometers to a scale of a few hundreds of micrometers in a MUX-DEMUX.read more
Figures
Fig. 16. Transmission spectrum of a four-channel MUX–DEMUX for (a)l = 23a and (b)l = 24a calculated by CMT. 
Fig. 15. Transmission spectrum of a four-channel MUX–DEMUX for (a)l = 23a and (b)l = 24a calculated by FETD-BPM. 
Fig. 1. Photonic crystal. 
Fig. 5. Coupling length of a PC waveguide coupler with two rows of rods in the interaction region. 
Fig. 3. Dispersion curves of even and odd modes in a PC waveguide coupler with two rows of rods in the interaction region. 
Fig. 6. Transmission spectrum of a PC waveguide coupler with two rows of rods for input pulses launched into (a) port 1 and (b) port 2.
Citations
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Electro-optical switching using coupled photonic crystal waveguides
TL;DR: An electro-optical switch implemented in coupled photonic crystal waveguides (12, 14) was proposed and analyzed using both a finite-difference time-domain (FDTD) method and a plane wave expansion (PWM) method as discussed by the authors.
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Design of an all optical half-adder based on 2D photonic crystals
TL;DR: The main advantages of the proposed designation can be highlighted as its small sizing as well as simplicity, and the other improvement can be regarded as providing proper distinct space in output between “0” and “1” as logical states.
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Ultrashort 2-D photonic crystal directional couplers
TL;DR: In this article, a novel approach to reduce the coupling length and to increase the coupling coefficient in waveguide directional couplers implemented on two-dimensional photonic crystals (PhC) is proposed.
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2D photonic crystal cavity-based WDM multiplexer
TL;DR: In this paper, a two-dimensional (2D) photonic crystal (PhC) multiplexer based on contra-directional coupling and standing-wave resonators is proposed.
Journal ArticleDOI
Wavelength-division demultiplexing using photonic crystal waveguides
Tapio Niemi,Lars Hagedorn Frandsen,K.K. Hede,Anders Harpøth,Peter Ingo Borel,Martin Kristensen +5 more
TL;DR: In this article, the cutoff frequency of the fundamental photonic bandgap mode in consecutive sections of the waveguide is shifted by modifying the size of the border holes, and an experimental realization of a four-channel coarse wavelength division demultiplexer is described.
References
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