We present the design of a demultiplexer based on photonic crystals (PC). The control of the refractive index, periodicity, geometry and size of the structure, are very important to light propagation in PC. The demultiplexer is intended to separate pulse channels with 1.3 and 1.55 μm wavelength into wide pass band wavelength division multiplexing (WDM) optical telecommunications systems. The de...

A defect-tolerant design is presented for a demultiplexer circuit that is based on threshold logic. The design uses coding both to handle (i.e., tolerate) defects in the circuit and to improve the voltage margin in its gates. The following model is assumed for the defects: configured junctions can become either stuck open or stuck closed, and non-configured junctions can become shorted. Two rea...

A wave demultiplexer system with channels in a two-dimensional photonic crystal is proposed. The demultiplexer is realized by the coupling among an ultra-low-quality factor microcavity and resonators with high-quality factor. The coupling mode theory is employed to analyze the behavior of this system. The analytic results reveal that the reflection is fully absent at the peak frequencies for al...

Polymer optical fiber (POF) is one of the best transmission media for short-distance communications. To increase the transmission capacity of the fiber a wavelength-division-multiplexing (WDM) technique is commonly used. Several POF-WDM systems have been realized using interference filters and plane diffraction gratings as wavelength selective elements. In the present paper, for the first time ...

Mode multiplexer/demultiplexer for Space Division Multiplexing (SDM). .................... 2 Photonic Lantern ............................................................................................................... 2 Fiber Photonic Lantern ..................................................................................................... 3 Phoenix Fiber Lanterns ..........................