3 September 2002 -- Stockholm-based Transmode Systems AB - which has been shipping CWDM systems since March 2001 - and UK carrier Vtesse Networks have completed a field trial of an amplified coarse wavelength division multiplexing (CWDM) system over 200km.
The trial involved linear optical amplifiers (LOAs) from Genoa and is the first of its kind. Four CWDM channels of Gigabit Ethernet were transmitted over 125km of fibre by using one LOA as booster. By adding an further LOA, reach could be increased to 200km.
"Vtesse Networks is implementing a modern, high-capacity, low-cost data transmission network in the UK. For many of our transmission requirements, including mesh and point-to-point systems, CWDM offers the best balance between performance and cost-effectiveness", says Alan Mitchell, chief technical officer at Vtesse. "The inclusion of Genoa LOAs into this CWDM transmission platform allows us to extend span lengths to 100km and beyond without needing to resort to much more expensive DWDM equipment".
"A scalable and amplified CWDM solution will open up new markets for Transmode and our partners," says Transmode VP R&D Johan Sandell. With no sacrifice of performance, amplified CWDM systems allow carriers like Vtesse to reduce capital and maintenance costs by using less equipment and reduce their civil engineering costs, says Transmode.
"CWDM has the potential to change the cost structure of the last mile", says Genoa's Gerlas van den Hoven. "Transmode is taking advantage of the broadband nature and disruptive economics of LOA to expand the capability of this emerging network solution."