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January 17, 2013

NEC successfully tests real-time 1Tb/s super-channel transmission

Achieved error-free transmission for about 5,400km link

By CBR Staff Writer

Japanese Internet, broadband network and enterprise business applications provider NEC has successfully tested the real-time 1Tb/s super-channel transmission using 100GbE subcarriers over a trans-oceanic distance.

The result of transmission with claimed error-free performance was presented at the Asia Communications and Photonics Conference held in Shanghai, China.

The company claimed to have achieved error-free transmission for about 5,400km link through commercially available optical fibre and cost-effective repeater spacing, which provides a 43% improvement in the bandwidth usage compared to present commercial systems.

Software-defined pulse shaper and flexible-grid real-time 100Gb/s subcarriers were used to create a 1Tb/s superchannel, in which the pulse-shaper reduces transmission mutilations and provides flexible bandwidth allocation capabilities.

The test was conducted with superchannel made up of full-digital 100Gb/s subcarriers each equipped with a digital signal processor at the transmitter, capable of extending the re-configurability to a variable modulation format and/or for variable error-correction capabilities.

The digital-transmitter technology allows the 1Tb/s superchannel to transmit beyond 7,200km.

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