27 May 2010


Opnext and TeliaSonera demo first European real-time single-wavelength 100G field trial

Optical module and component maker Opnext Inc of Eatontown, NJ, USA has demonstrated a single-wavelength, real-time coherent 127G PM-QPSK (polarization multiplexed quadrature phase-shift keying) modem on the TeliaSonera network running through Sweden, representing the first real-time, single-wavelength 100G field trial in Europe.

The trial, conducted over a long-haul link with 10 and 40Gb/s mixed traffic, ran from Uppsala to Olofstrom and back for a total distance of 1700km, representing the longest un-regenerated real-time test to date.

“TeliaSonera has one of the largest and fastest-growing IP backbones in Europe, and this trial demonstrates our focus on maintaining a state-of-the-art network that is ready to use next-generation technologies, such as coherent 100Gb/s,” says Staffan Gojeryd, TeliaSonera’s head of Broadband Development.

The transmission channel did not require optimization to implement the 100Gb/s technology, further demonstrating the ease-of-use of coherent technology, says Opnext. Currently, many 10Gb/s and most 40Gb/s optical systems using direct detection require optimization and intervention by an optical network engineer to balance all the optical impairments on an installed optical fiber. Opnext’s plug-and-play technology allows carriers to upgrade their existing line systems to 100Gb/s without requiring any change to their networks. In addition, new systems can eliminate the need for external dispersion compensation, reducing cost, minimizing IP latency and allowing deployment over older installed fiber.

“100G modem performance is critical to help carriers meet the ever-increasing bandwidth demands,” says Mike Chan, president of Opnext’s Subsystems business unit. “This trial represents the longest real-time 100G trial performed to date, moving the industry one step closer to the commercialization of 100G technology.”

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