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Duo achieves new 100Gbit/s optical transmission record

Posted: 29 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:optical transmission? fiber optic? 100Gbit/s speed?

Verizon and Nokia Siemens Networks claim to have taken a step closer to being able to transmit commercial traffic at 100Gbit/s. The two companies carried out a successful 100Gbit/s transmission on a single wavelength for more than 1,040km over field fiber, setting a new distance record and demonstrating better performance than conventional transmission.

The field trial, conducted on optical fiber on the Verizon network in north Dallas, successfully proved that 100Gbit/s signals can be simultaneously transported with 10- and 40Gbit/s signals on the same system with superior results by using advanced optical techniques

The Nokia Siemens hiT 7500 ultra-long-haul, dense-wavelength-division-multiplexing platformcombined with multi-level modulation, polarization multiplexing and coherent detectionallowed the signal to be carried over ultra-long distances at high-data rates with significantly better chromatic dispersion and polarization-mode-dispersion tolerances than conventional systems.

"As a leader in pursuit of 100Gbit/s technology, Verizon's goal is to drive optical networking to deliver greater capacities over longer distances to enhance the high performance and high bandwidth of our network," said Mark Wegleitner, Verizon senior VP for technology. "Whether it's FiOS delivering HD channels and video on demand or business customers using database applications and online trading, we strive to provide the most advanced underlying network technology for our customers."

The field trial also demonstrated that 100Gbit/s traffic can be simultaneously transported with any mix of 10- and 40Gbit/s on a typical 80-channel ULH DWDM system. As a result, current network configurations can support capacity upgrades to 100Gbit/s per channel on existing routes over similar distances without modification to the physical network, providing quicker, cost-effective implementation.

Like Verizon's previous 100Gbit/s trial in late 2007, this field trial also carried the 100Gbit/s signal on a single wavelength, demonstrating true 100Gbit/s throughput in a serial configuration. In this field trial, the modulation technology enabled an even higher total system capacity of 8Tbit/s.

"This is another groundbreaking milestone for Nokia Siemens Networks and Verizon's photonic networking expertise in shaping the development of a 100G commercial product," said Bernd Schumacher, head of Nokia Siemens IP transport business unit. "This field trial was a logical next step to demonstrate that our optical-transport technology adds value to our customers' core networks.

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