Telecoms ♦ news digest
Infinera plans to deliver the 500Gb/s PICs as part of a system which integrates 5 Terabit per second (Tb/s) OTN switching and 100Gb/s coherent optical transmission in early 2012. Enabling seamless upgrades from existing 10Gb/s networks without having to upgrade the underlying fibre infrastructure, this technology is designed to provide SEACOM’s land-based network in South Africa with a total capacity of over 8Tb/s per fibre, which is an effective 10 fold increase on its current capacity. This is in line with and in support of SEACOM’s plans to expand the marine portion of the cable to over 4.8Tb/s.
“The trial is a landmark achievement for SEACOM and Infinera because it demonstrates our commitment to increase the pace at which African networks are deploying cutting-edge telecommunications infrastructure technology to support Africa’s rise as a primary scientific and business destination,” said Brian Herlihy, SEACOM CEO.
Fibre optic transmission technologies have been developing considerably to satisfy demand for large-capacity digital transmission in public telecommunication networks worldwide. At the consumer level, the 500Gb/s PIC technology enables the download of 30 high-definition Blu-Ray movie files in 60 seconds, or supports the streaming of 4,000 simultaneous high definition video channels over a single optical channel.
At the network level, 100Gb/s systems based on PIC technology will have important implications for the economics of future networks. Infinera’s 500Gb/s PICs incorporate more than 600 optical functions on a pair of indium phosphide chips enabling cost effective 100Gb/s coherent transmission as well as integrated OTN switching to deliver the Digital Optical Network.
These capabilities provide an effective means for network operators to scale network capacity while lowering operational costs, increasing reliability and providing for superior network economics.
“With Internet traffic growing at exponential rates, driven by video, cloud computing, and mobility, the 500G PIC technology is designed to support the required growth in network capacity, while reducing the per-bit cost, space, and power consumption,” said Tom Fallon, Infinera CEO. “These attributes
are in-line with SEACOM’s vision to providing world- class infrastructure as African traffic continues to increase at record speeds.”
GaAs entices electrons to ‘dance’ and form a new state
Using temperatures close to absolute zero and a magnetic field, researchers have captured electrons in ultrapure gallium arsenide microscopic wells and forced them to interact only with each other.
A team of Purdue University researchers is among a small group in the world that has successfully created ultrapure material that captures new states of matter and could have applications in high-speed quantum computing.
The team has used GaAs based structures to observe states in which electrons no longer obey the laws of single-particle physics, but instead are governed by their mutual interactions.
Michael Manfra, who leads the group, commented, “These exotic states are beyond the standard models of solid-state physics and are at the frontier of what we understand and what we don’t understand. They don’t exist in most standard materials, but only under special conditions in ultrapure gallium arsenide semiconductor crystals,”
Figure: Michael Manfra (left) and Gabor Csathy stand next to the high-mobility GaAs MBE system at the Birck Nanotechnology Centre. Manfra holds a GaAs wafer on which his research team grows ultrapure GaAs semiconductor crystals to observe new electron ground states that could have applications in high-speed quantum computing. (Purdue University photo/Andrew Hancock)
August/September 2011
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