Long-haul optical fibres enable extended reach in 40G and 100G networks

Corning Incorporated has found success with its long-haul optical fibre products in 40 gigabits per second (G) and 100G network systems with Ciena Corporation.

Extended reach and the ability to construct longer spans enable high-capacity transmission over long distances without expensive regeneration.

This thereby reduces capital expenses and simplifies the construction and deployment of high-data-rate terrestrial networks.

The 100G system travels a distance of 1,500 kilometers (km) and consists of 12 spans, each 125 km. The configuration is possible using Corning’s SMF-28 ULL optical fibre, the lowest attenuation ITU-T G.652-compliant fibre, and Ciena’s 100G Adaptive Optical Engine, both of which are commercially available.

The average fibre attenuation of each span is at or below 0.17 decibels of loss per kilometer (dB/km) at 1550 nanometers (nm). The ultra-low attenuation of SMF-28 ULL fibre enables a 30-35 per cent longer system reach compared to typical single-mode fibres.

“We are delighted to work with Ciena to show a 100G solution with commercially available products,” said
Martin J. Curran, senior vice president and general manager of Corning Optical Fiber. “We continue to improve our long-haul optical fibre products so they deliver the robust performance our customers require today and in the future. Low-loss optical fibre allows network operators to extend optical reach at very high data rates and make their network scalable for the higher capacities that will be required to meet growing bandwidth demand.”

The companies will also demonstrate Ciena’s newly developed 40G ultra long haul solution over an unregenerated distance of 3,100 km using Corning long-haul optical fibres. Ciena’s 40G signal will be transmitted through 1,600 km of Corning’s LEAF fibre and 1,500 km of SMF-28 ULL fibre, in a configuration representative of some of the most challenging long-distance network designs.

Finally, the companies will also demonstrate 100G performance over 800 km of Corning LEAF fibre, the most widely deployed non-zero dispersion shifted fibre. LEAF fibre has the lowest attenuation and largest effective area of any ITU-T G.655-compatible optical fibre, enabling a 20-25 per cent greater system reach compared to typical G.655 fiber. The average LEAF fibre attenuation of each span is at or below 0.190 dB/km at 1,550 nm.



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