Optical switch

About: Optical switch is a research topic. Over the lifetime, 28538 publications have been published within this topic receiving 351176 citations.

Method and apparatus for operation, protection, and restoration of heterogeneous optical communication networks

Abstract: Techniques for providing normal operation and service restoration capability in the event of failure of terminal equipment or transmission media in a heterogeneous network, such as a hybrid network containing single- and multi-wavelength lightwave communications systems. An optical switching node (OSN) is placed at each node in the ring network to provide the required connections between various fibers and terminal equipment, but having switch states that allow signals on the protection fibers to bypass the terminal equipment at that node. Ring-switched signals propagate around the ring on protection fibers without encountering the terminal equipment at the intervening nodes. To the extent that the protection fiber links between any given pair of nodes are incapable of supporting all the relevant communication regimes, such links are modified to provide such support.

On the Feasibility of Optical Circuit Switching for High Performance Computing Systems

Abstract: The interconnect plays a key role in both the cost and performance of large-scale HPC systems. The cost of future high-bandwidth electronic interconnects mushrooms due to expensive optical transceivers needed between electronic switches. We describe a potentially cheaper and more power-efficient approach to building high-performance interconnects. Through empirical analysis of HPC applications, we find that the bulk of inter-processor communication (barring collectives) is bounded in degree and changes very slowly or never. Thus we propose a two-network interconnect: An Optical Circuit Switching (OCS) network handling long-lived bulk data transfers, using optical switches; and a secondary lower-bandwidth Electronic Packet Switching (EPS) network. An OCS could be significantly cheaper, as it uses fewer optical transceivers than an electronic network. Collectives and transient communication packets traverse the electronic network. We present compiler techniques and dynamic run-time policies, using this two-network interconnect. Simulation results show that our approach provides high performance at low cost.

Optical harmonic generation and mixing in multilayer media: analysis using optical transfer matrix techniques

Abstract: Optical harmonic generation from a multilayer sample consisting of an arbitrary number of parallel slabs of arbitrary thicknesses can be treated exactly (in the limit where the nonlinear depletion of the pump beam can be neglected) by using a transfer matrix technique. This approach is described, and the results are given in a computationally convenient form. The technique is illustrated by application to a typical case.

All-optical switching and routing based on an electromagnetically induced absorption grating

Abstract: An electromagnetically induced absorption grating is formed in a three-level atomic vapor under the condition of electromagnetically induced transparency in which the strong coupling beam is replaced by a standing wave The transmission and reflection behaviors of the weak probe beam are greatly modified at certain frequencies near the two-photon resonance An all-optical two-port signal router–all-optical switch is demonstrated

IST-LASAGNE: towards all-optical label swapping employing optical logic gates and optical flip-flops

Abstract: The Information Society Technologies-all-optical LAbel SwApping employing optical logic Gates in NEtwork nodes (IST-LASAGNE) project aims at designing and implementing the first, modular, scalable, and truly all-optical photonic router capable of operating at 40 Gb/s. The results of the first project year are presented in this paper, with emphasis on the implementation of network node functionalities employing optical logic gates and optical flip-flops, as well as the definition of the network architecture and migration scenarios.