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Bell Labs Reports First Transmission of 100-Gb/s Ethernet Over Optical

Photonics.com
Oct 2005
MURRAY HILL, N.J., Oct. 3 -- Bell Labs, the research and development division of Lucent Technologies, announced the first reported transmissions of 100-Gb/s Ethernet over optical, widely considered a significant milestone in the industry's move toward migrating to 100-Gb/s data networking, in two papers presented to the European Conference and Exhibition on Optical Communication in Scotland.

"This work is a major first. We have broken through the ceiling in transmission rates and described two techniques that could help implement 100-G Ethernet over optical systems," said Bell Labs Director Martin Zirngibl. "With more and more enterprises moving to 10-Gb/s transmission, carriers are looking to implement 100-Gb/s Ethernet in the metro area network as a way to efficiently multiplex and transmit high amounts of data in its native Ethernet format."

Currently, Ethernet signals are transported over 10 Gb/s and, occasionally, over 40-Gb/s SONET connections. This Bell Labs work is aimed at producing 100-Gb/s Ethernet over optical transmission. The Bell Labs research team was able to deliver a 107-Gb/s optical data stream, representing 100 Gb/s of data transmission plus a standard 7 percent overhead for error correction, using duobinary signaling, which require less bandwidth than traditional NRZ (non-return to zero) signals and enabled the creation of an optical 107-Gb/s serial data stream using a commercially available optical modulator (rated for 40 Gb/s), and a single-chip optical equalizer, which compensated for almost all intersymbol interference arising from modulator bandwidth limitations in an optical 107-Gb/s NRZ electronic time division multiplexing transmitter. As with the duobinary approach, Bell Labs researchers used a commercially available 40-Gb/s optical modulator in combination with the optical equalizer to generate a 107-Gb/s optical NRZ data stream.

For more information, visit: www.bell-labs.com




GLOSSARY
photonics
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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