Optical-Logic-Gate Aided Packet-Switching in Transparent Optical Networks

Abstract

Abstract-The objective of this research is to propose two new optical procedures for packet routing and forwarding in the framework of transparent optical networks. The single-wavelength label-recognition and packet-forwarding unit, which represents the central physical constituent of the switching node, is fully described in both cases. The first architecture is a hybrid opto-electronic structure relying on an optical serial-toparallel converter designed to slow down the label processing. The remaining switching operations are done electronically. The routing system remains transparent for the packet payloads. The second architecture is an all-optical architecture and is based on the implementation of all-optical decoding of the parallelized label. The packet-forwarding operations are done optically. The major subsystems required in both of the proposed architectures are described on the basis of nonlinear effects in semiconductor optical amplifiers. The experimental results are compatible with the integration of the whole architecture. Those subsystems are a 4-bit time-to-wavelength converter, a pulse extraction circuit, a an optical wavelength generator, a 3 8 all-optical decoder and a packet envelope detector.Index Terms-Optical header processing, optical logic gate, optical packet switching, semiconductor optical amplifier (SOA), transparent optical network.

Gain characteristics and femto-second optical pulse response of 1550nm-band multi-stacked QD-SOA grown on InP(311)B substrate

“…In particular, a semiconductor optical amplifier (SOA) is a very attractive and promising nonlinear element, and a large number of all-optical logic gate devices using SOAs have been reported [3][4][5]. So far, we have investigated the optical logic gate device integrated with an SOA and ring resonators [6,7], in which the SOA utilized a highly-stacked quantum dot (QD) structure, and we analytically indicated the potential of the device for ultra highspeed all-optical logic gate operation at 160 Gb/s [8][9].…”

Automatic multirate all-optical routed network based on optical code division multiplexing solution

“…Network providers are therefore moving towards optical networks to offer higher capacity at reduced costs. In recent years more efforts were consent for all-optical implementation of routing node functionalities and thus several routing techniques have been recently proposed using logical gates [1]- [2], multiple SAC-Label recognition based on four wave mixing [3], Hybrid Header Address Correlation scheme [4].…”