Nippon Telegraph and Telephone Corporation (NTT) announced a new optical amplification technology capable of delivering 10 Gbps at 100km reach. The technology was developed in collaboration with Japan’s National Institute of Information and Communications Technology.
NTT Access Network Service Systems Laboratories said the new optical amplification technology provides inexpensive wide dynamic range optical amplifiers and can handle burst signals generated in Ethernet PON systems. The optical amplification technology includes an automatic level control (ALC) technology that can assess the input burst signals and, at high speed, adjust them to a constant level by controlling optical attenuators.
In a field trial carried out in Hokkaido prefecture, NTT East buildings in Sapporo, Toyohira, Eniwa and Chitose were connected by optical fibers with total length over 100km. Good results were reported.
http://www.ntt.co.jp
