Novel designs of demultiplexers based on photonic crystal fibers (PCF) s and photonic crystal waveguides (PCW) s are presented here. We have considered two types of PCFs and PCWs, namely Dual concentric core PCF, Multicore PCF, PCW with dielectric rods in air and PCW with air holes in dielectric background. Finite difference time domain method (FDTD) is employed to analyze all these devices at ...

We present simulation results of an ultrafast all-optical router and a technique for separating the clock synchronization pulse from an incoming optical time division multiplexed data packet, based on all optical switches employing optical feedback. Three terahertz optical asymmetric demultiplexers (TOADs) have been used to model a 1x2 router. Simulation results show that synchronization betwee...

.................................................................................... x 1 LITERATURE REVIEW......................................................................................... 1 1.1 Background in WDM Communication Networks................................. 1 1.2 Wavelength Demultiplexing In WDM Networks..................................... 1 1.3 Implementation of Wavelength D...

Accurate temperature control is crucial for the reliable operation of photonic integrated circuits in the presence of internal thermal crosstalk or external thermal disturbance. We propose an adaptive multiple-input and multiple-output (MIMO) control scheme to stabilize the operation wavelength of on-chip wavelength demultiplexers that have many applications in photonic-chip-based optical signa...

Mode-division-multiplexing (MDM) and wavelength-division-multiplexing (WDM) are employed simultaneously in a multimode silicon waveguide to realize on-chip MDM and MDM-WDM transmission. Asymmetric Y-junction MDM multiplexers and demultiplexers are utilized for low coherently suppressed demultiplexed crosstalk at the receiver. We demonstrate aggregate bandwidths of 20 Gb/s and 60 Gb/s for MDM an...

The laser wavelength dependence on the temperature, polarization current, aging, can represent a problem in optical networks where multiple multiplexing and demultiplexing operations occur. These demultiplexing operations are commonly performed using fiber Bragg gratings, due to their versatility and unique filtering capabilities. In this contribution we evaluate the dependence of WDM networks ...

Fabry-Perot Filters are major candidates for use as demultiplexers in wavelength division multiple access networks. In this paper we investigate the crosstalk limitations of such filters, compare their performances, and optimize the filter design to minimize the crosstalk degradation. 1 Bol.h witli the al)()rt;l.orlo for informltaiou a.icl I)ecision Ssleties. ilT. C(amlridge. hi\ 02139. This wo...