Building a Fully Flexible Optical Layer with Next-Generation ROADMs
■The optical networking industry is in the midst of a Reconfigurable Optical Add Drop Multiplexer (ROADM) renaissance. While early-generation ROADMs brought operators some benefits in provisioning optical bandwidth and reducing technician truck rolls, they lack much of the flexibility operators need – particularly at the end-points of a connection where wavelengths are added to and dropped from the network.
■Over the past 18 months, a new generation of ROADMs has emerged that promises the flexibility to achieve highly automated mesh networking at the photonic layer. The key components of this new ROADM generation include: color independent or "colorless" functions; direction independent or "directionless functions; freedom from wavelength contention or "contentionless" functions; and flexible use of the International Telecommunication Union (ITU) grid, or "flexible spectrum."
■Significantly, interest in these functions and their benefits cut across operator types and is global.
■This white paper provides a timely update on the evolution to next-generation ROADMs, from technology, application and service provider adoption perspectives. The paper provides the latest operator and supplier thinking on colorless, directionless, contentionless and flexible spectrum technologies. Among the topics covered are:
▲The different technology building blocks in play for CDC-F, such as advanced Wavelength Selective Switch (WSS) elements, route and select architectures, multicast switches and coherent receivers
▲Emerging applications for CDC networks, such as network defragmentation and optical layer restoration
▲Operator timelines for migrating to next-gen ROADM networks
▲Beyond 100G transport and the emergence of the "Super Channel"
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White Paper |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2011/10/6 |
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542 KB |
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