Broadwing Communications Transmits OC-192 Signals 4,000 km Without Electrical Regeneration Using Corvis Equipment
Source: Compound Semiconductor staff
August 21, 2000
Broadwing Communications has successfully completed a field trial in which 10 Gb/s (OC-192) signals were transmitted over a 4,000-km section of Broadwing s nationwide network without the need for electrical regeneration. The experiment, which marks the longest terrestrial distance for regeneration-free transmission, was achieved using all-optical networking technology supplied by Corvis Corp.
Due to the losses experienced in fiber-optic transmission, signals must be periodically regenerated. At present, optical signals are detected and converted to electrical signals - these are reshaped, retimed and converted back to the optical domain for transmission along the next section of fiber. In conventional terrestrial long-haul systems, signals generally travel about 600 km before regeneration. All-optical networks such as those being deployed by Corvis and Qtera (now part of Nortel Networks) have significantly extended this distance. Fewer fiber-optic components are required to perform the regeneration functions, but a great deal of amplification (in the form of high performance EDFAs) will be required to compensate for optical losses. For more information, see http://www.compoundsemiconductor.net/archives/6-1final/covstor1.htm
Broadwing conducted the field trial of Corvis OC192 (c) product on a 4,000-km section of its network transmitting OC-192 signals from Phoenix to Fort Worth and back to Phoenix without electrical regeneration. Broadwing states that the elimination of electrical regeneration will allow the company to increase the performance and reliability of its network, while significantly reducing capital and operating costs.
For more information, see www.corvis.com or www.broadwing.com
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Web site: http://www.corvis.com