160 Gbit/s TDM-Transmission Technology
H.G. WeberR. LudwigChristian SchmidtColja SchubertJ. BergerE. HilligerM. KrohV. MarembertC. BoernerS. FerberH.J. Ehrke
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Abstract:
We report on optical time division multiplexing (OTDM) technology for data rates of 160 Gbit/s. In particular, semiconductor based devices for optical signal processing are discussedKeywords:
Gigabit
Time-division multiplexing
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InP-based OEIC receivers look promising for high-speed (/spl ges/10 Gb/s) optical communications systems and for WDM networks because of the inherent advantages of integration, and the intrinsic speed of the devices available. This paper reviews recent developments.
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Welcome to the second set of articles in the Lightwave Series this year. After the first set appeared in the month of February and a featured topic in the month of March, we now present three more exciting articles in this issue. All these activities reflect the fact that lightwave technology is rapidly reaching maturity. As deployment scenarios continue to expand, optics will be the key enabler, much sooner than one would estimate, to overcome the bottleneck in the access part of the network as well. IP-over-WDM integration and intelligence in the optical infrastructure for control, protection/reliability, and management are the key areas receiving tremendous attention from the research and manufacturing communities. These key areas address the issues of scalability, quality of service, and cost. An exciting aspect of lightwave technologies is that they are developing at a breathtaking pace similar to how silicon-based components and modules evolved, now becoming commodity products. Nowadays, it is becoming easier to buy optical components and subsystems off the shelf and build a system in record time. Even those who have never worked with photons before can do the same. Furthermore, the lead time between research and products continues to shrink due to rapid advances in materials, components, and all the way through to systems development, giving impetus to exponential bandwidth increase in the optical fiber and its intelligent management. However, we believe there are still aspects of lightwave technologies that some of you arc working on of which most readers are not yet aware. We encourage you to submit articles on such topics.
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The optical fiber transmission links form the backbone of the communications infrastructure. Almost all of voice and data (internet) traffic is routed through terrestrial and submarine optical fiber links, connecting the world together. Invention of the optical amplifiers (OAs) and wavelength-division multiplexing (WDM) technology enabled very high capacity optical fiber communication links that run for thousands of kilometers without any electronic repeaters, but at the same time brought many design challenges. As electronic amplifiers do, OAs add noise to the signal they amplify. In the design of an optical fiber communication link, the prediction of the deterioration the information signals experience due to the nonlinearity of the optical fiber and the optical noise generated by the OAs is essential. In this paper, we first present a short overview of optical fiber communication systems and the challenges that faces one from a modeling, analysis and design perspective. Then, we describe novel formulations and computational techniques for the analysis of the interplay between the information signals and the optical noise due to the fiber nonlinearity as they propagate together along the fiber link. Our formulations are similar, in spirit, to the linear(ized), time-varying formulations for noise analysis in analog/RF electronic circuits. We then investigate signal-noise mixing due to optical fiber nonlinearities using the techniques developed. Finally, we discuss the use of the generated results in the performance evaluation of communication links, and comment on system design implications.
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Optical communications repeater
Optical link
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Presents the guest editorial for this issue of the publication.
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Digital Signal Processor (DSP) topologies and associated technologies for optical transceivers using data-rates >100Gbit/s to enable SMF transmission of 10 to 100km are reviewed and trade-offs discussed in the context of evolving requirements and future technical advances.
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This tutorial highlights challenges and opportunities in achieving efficient flexible optical networks. Optical signal processing may potentially increase network flexibility because of its functions' transparency, tunability, and reconfigurability. We review recent advances in high-speed optical signal processing techniques that might enable flexible networks. Various optical approaches that enable key functions are discussed, including format conversion, increases in spectral efficiency, and phase-sensitive operations. We also discuss the potential utilization of basic enabling technologies, such as optical frequency combs and optical nonlinear devices.
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Optical communications repeater
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