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Copper speed vs. How does optical stack up to competing technologies like fixed point wireless?

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Analyzing the performance of optical multistage interconnection networks with limited crosstalk

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Optical Switching and Networking Handbook - Regis "Bud" J. Bates - Google книги

Ships with Tracking Number! Many new applications will emerge that can take advantage of the capacities and capabilities of DWDM. Already it has proven to be particularly well suited for several vital applications. DWDM is ready-made for long-distance companies that use point-to-point or ring topologies. The immediate access to 16 new transmission channels replacing one dramatically increases the operator s chances of success and acceptance by the user community. This increased capacity is critical to self-healing rings, which characterize today s most sophisticated telecom networks.

Application of Remote Power-by-Light Switching in a Simplified BOTDA Sensor Network

Deploying DWDM enables a carrier to construct a percent protected ring using two fibers. Operators building or expanding their networks also will find DWDM as an economical opportunity to incrementally increase capacity. Network wholesalers can take advantage of DWDM to lease capacity, rather than entire fibers, either to existing operators or to new market entrants.

DWDM will be especially attractive to companies that have low-fiber-count cables that were installed primarily for internal operations but that could now be used to generate telecommunications revenue. Optical Switching and Networking Handbook.


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  • Optical switching and networking handbook / Regis J. "Bud" Bates..

In an electronic switch, electronic buffer memory provides storage when needed to avoid collisions between outgoing packets on the same output port. In a recent paper, 4 we reported a detailed study that compared the advantages of optical and electronic switching, with a focus on power dissipation. This key consideration has largely been ignored by the optical packet switching research community.

Network Two Buildings with Fiber Optic Cable

Optical switching will never play a significant role in the Internet if it consumes more energy than electronic switching. Our study included the two main physical-layer parts of a router: the buffer and the cross-connect switch. We used aggressive but plausible estimates of buffer and switch performance projected out to around Our analysis of buffer technologies was based on models of power dissipation in optical delay-line buffers and in high-capacity, rapidly reconfigurable optical cross-connects. We also looked at storage capacity in slow-light delay lines.

In addition, we compared conventional fiber delay-line buffers with slow-light delay-line buffers using photonic crystals, resonator structures, and electromagnetically induced transparency. We concluded that optical packet switching does not provide a magic solution to the problem of providing an ever-expanding switching capability in the Internet. In particular, planar integrated optical buffers including slow-light buffers occupy a larger chip area than their electronic equivalents, dissipate more power, and are limited in capacity to, at most, a few IP packets.


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  8. Optical-fiber-based buffers have low power dissipation but are bulky. Optics is well suited to transmission of data, and electronics is well suited to buffering and manipulation of data. Note that unforseen technology breakthroughs could well change some of our conclusions. However, we hope that our work stimulates discussion and debate on the relative merits of electronic and optical packet switching. If this debate eventuates, it needs to consider the centrally important issue of energy consumption.

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    Sign In View Cart 0 Help. News Menu. Despite advances in the technology, all-optical packet switching will not be competitive with its conventional electronic counterpart. Schematic of electrical upper diagram and optical lower diagram packet switches. The line cards connect to the cross-connect switch fabric.