Wednesday, June 20, 2012

NEC Supplies 100G DWDM for NTT Trial

NEC announced its participation in a trial of 100G optical transmission technology carried out by NTT Communications. The trial uses commercial fiber cable along Japan's highest volume transmission route spanning 710 km between Tokyo, Nagoya and Osaka.

NEC supplied its "SpectralWave DW7000," a 100 Gbps DWDM transmission system with a wavelength interval of 50GHz and capacity of 88 wavelengths. The testing took place in March 2012 along the repeater and DSF fiber-optic cables connecting Tokyo, Nagoya and Osaka.

NEC noted that actual operating conditions over existing fiber present a variety of operational challenges, including fluctuations in optical signal loss due to transmission route changes and variability in optical fiber characteristics (Chromatic Dispersion, Polarization-Mode Dispersion). NEC's 100Gbps-DWDM system addressed these issues by utilizing a transponder equipped with its internally developed 100G DP-QPSK digital coherent optical transceiver module, which demonstrated stable, error-free transmission of 100 Gigabit Ethernet signals between Tokyo, Nagoya and Osaka.