Wavelength-division multiplexing

About: Wavelength-division multiplexing is a research topic. Over the lifetime, 25059 publications have been published within this topic receiving 332027 citations. The topic is also known as: WDM.

Optical Network Design and Implementation

Abstract: A comprehensive guide to understanding and configuring multiservice DWDM, SONET, and SDH architecturesOptical Network Design and Implementation provides in-depth coverage of the following: DS1/DS3/E1/E3 over SONET/SDH IEEE 802.17 Resilient Packet Ring (RPR) Fast/Gigabit Ethernet over SONET/SDH VRF virtual private networks Double-tagged 802.1Q VPNs SAN transport, FICON, and Fibre Channel over SONET/SDH DWDM infrastructures Analysis of DWDM, SONET, and SDH architecturesMultiservice optical networking has multiple applications in service provider and enterprise environments. To help you make the most of these applications, Optical Network Design and Implementation provides a complete reference of technology solutions for next-generation optical networks. The book explains the differences among various MAN technologies, getting you up to speed on the solutions you need to use.Optical Network Design and Implementation contains a broad range of technical details on multiservice optical networking and covers optical networking theory, design, and configuration by providing informative text, illustrations, and examples. It can be used as a reference for anyone designing, implementing, or supporting an optical network. Even if you're not using Cisco ONS equipment, this book can increase your awareness and understanding of optical technologies and provide you with detailed design concepts and rules for building highly scalable multiservice optical networks.This book covers the entire spectrum of optical networking technologies from the physical layer to the network layer. If you are a network architect, network manager, or a consultant who designs, deploys, operates, or troubleshoots multiservice optical and DWDM networks, Optical Network Design and Implementation is your comprehensive guide to optical networking."This represents the first book that offers a comprehensive and technical guide to unique IP+Optical innovations with Cisco COMET." -Jayshree V. Ullal, Senior Vice President, Optical Networking Group Cisco Systems, Inc.This book is part of the Networking Technology Series from Cisco Press, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.158705105203152004

Design of a survivable WDM photonic network

Abstract: We consider schemes for protecting a network using a wavelength division multiplexing (WDM) infrastructure against component or link failures. First, we explain how protection can be achieved by hardware redundancy. Then, we consider that with WDM networks, the failure of a single link or component may cause the simultaneous failure of several optical channels, potentially making impossible the restoration by rerouting in higher layers (SDH, ATM, IP). To address this, we introduce the concept of design protection, which aims at making such failure propagation impossible. We present the disjoint alternate path (DAP) algorithm which places optical channels in order to maximise design protection. We show the result on the example of the ARPA-2 network.

1.49-/spl mu/m-band gain-shifted thulium-doped fiber amplifier for WDM transmission systems

Abstract: This paper describes in detail the amplification characteristics of gain-shifted thulium-doped fiber amplifiers (GS-TDFAs) operating in the 1480to 1510-nm wavelength region (1.49-/spl mu/m S-band) for use in wavelength-division-multiplexing (WDM) systems. Gain shifting of a TDFA, which normally has a gain band at 1.47 /spl mu/m (S/sup +/-band), is achieved by two types of dual-wavelength pumping: (1) 1.05 and 1.56 /spl mu/m or (2) 1.4 and 1.56 /spl mu/m. The main pump source at 1.05 or 1.4 /spl mu/m creates population inversion between /sup 3/F/sub 4/ (upper laser level) and /sup 3/H/sub 4/ (lower laser level), while the auxiliary pump source at 1.56 /spl mu/m reduces the average fractional inversion down to approximately 0.4, which is a desired level for gain shifting. We show experimentally that the former provides a low internal noise figure (<4 dB) due to high fractional inversion at the input end of a thulium fiber, while the latter provides a very high optical efficiency but a higher internal noise figure (/spl sim/5 dB) due to the lower fractional inversion at the input end. These characteristics were verified by numerical simulation based on a comprehensive rate equation modeling. We demonstrated a 1.4- and 1.56-/spl mu/m laser-diode-pumped GS-TDFA with an optical efficiency of 29.3% and high output power of +21.5 dBm. Gain flatness and tilt control were also investigated. These results strongly confirm the feasibility of using GS-TDFAs in practical ultralarge-capacity WDM networks.

Digitally tunable laser based on the integration of a waveguide grating multiplexer and an optical amplifier

Abstract: A novel monolithic semiconductor laser is demonstrated. The optical cavity comprises a 1/spl times/N waveguide grating multiplexer connected to N optical amplifiers. By driving a specific output port, laser oscillation is obtained at the wavelength determined by the wavelength path through the multiplexer. Such a laser is very useful for WDM systems because it is capable of producing a comb of precisely spaced frequencies. >

Micromechanical light steering optical switch

Abstract: An optical switch uses a micromachined adjustable phase hologram device to route optical signals from an input fiber to selected output fibers is described. The adjustable phase hologram includes a large number of micromachined reflective ribbons which can be individually controlled and adjusted to produce a wide range of phase profiles to route the light beams from the input fiber. This optical switch is capable of dealing directly with optical signals, has fast switching speeds, is capable of routing WDM input signals, is polarization independent, is scalable to large switches, and avoids the complexity of other switches.