A fast algorithm based on a butterfly structure is presented that demultiplexes the symbols of a particular type of MC-MA (Multi-Carrier Multiple-Access) modulation previously proposed for indoor radio communications [1]. A special transform is used to packetize the different symbols on the down-link such that the code sequences associated with the different symbols are transmitted synchronousl...

We demonstrate waveguide integrated germanium detectors with capacitance as small as 2.4 fF and directly recorded impulse response as fast as 8.8 ps. Based on such detectors and cascaded silicon microring resonators we also demonstrate a highly scalable wavelength division demultiplexing system that can potentially provide tera-bit/s (Tbps) bandwidth over a small area.

Ultrafast all-optical cross phase modulation (XPM) effect in InGaAs/AlAsSb quantum well is reviewed and its application to ultrafast all-signal processing is presented. Error free demultiplexing operation from 160-Gb/s to 40-Gb/s with low gating power is demonstrated. Keywords; ultrafast signal processing; quantum well; cross phase modulation; 160-Gb/s

Future ultra high bit-rate optical time division multiplexed (OTDM) systems may require all-optical demultiplexing to down convert high bit-rate data to e.g. 10 Gbit/s or 40 Gbit/s where electronic circuits can be used. Many suggestions of such demultiplexers have been proposed over the years. The most common device is the nonlinear optical loop mirror (NOLM) that allows switching due to cross ...

Advances in VLSI and ber optic technology are shifting performance bottlenecks from the underlying networks to the communication subsystem. A communication subsystem consists of protocol tasks and operating system mechanisms. Protocol tasks include connection establishment and termination, end-to-end ow control, remote context management, segmentation/reassembly, demultiplexing, error protectio...

The paper presents a novel N-channel chained symmetric-Mach-Zehnder-interferometers demultiplexer (CSMZI) for high-speed OTDM networks. The proposed scheme offers parallel demultiplexing capability with reduced complexity. Simulation results show that low bit error rate performance is achieved with low power penalty.

Recent developments in thin-film coatings for optical communication systems are reviewed. Particular emphasis is given to thin-film designs with dispersion related to the photonic crystal superprism effect. A single dispersive coating may be used for multiplexing or demultiplexing several wavelength channels by spatial beam shifting. 2004 Optical Society of America OCIS codes: (310.0310) Thin ...

By using a generalized cost function, a modified constant modulus algorithm (CMA) that allows polarization demultiplexing and equalization of polarization-switched QPSK is found. An implementation that allows easy switching between the conventional and the modified CMA is described. Using numerical simulations, the suggested algorithm is shown to have similar performance for polarization-switch...

We demonstrate the monolithic integration of photonic crystal waveguides, a photonic crystal demultiplexer, a conventional waveguide and photodiodes in InGaAsP-based material. The photonic crystal demultiplexer consists of hexagonally arranged air holes. The inputted light at the wavelengths of 1530nm and 1550nm can be separated by the demultiplexing system. Keywords-component; Photonic crystal...