NEC contributes to Fiber Cable Transmission

VARINDIA- INDIA'S FRONTLINE IT MAGAZINE

NEC contributes to Fiber Cable Transmission 
NEC has participated in Japan's first DWDM transmission of 100Gbps per wavelength, realized using commercial fiber cable along Japan’s highest volume transmission route connecting the 710 km between Tokyo, Nagoya and Osaka. These results were accomplished through 100Gbps optical transmission trials carried out by NTT Communications Corporation.
Tests were conducted using existing commercial cable with the intention of introducing 100Gbps-DWDM systems to backbone networks in the near future. These actual operating conditions 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.
Furthermore, the 100Gbps-DWDM transmission system used for these tests demonstrated both a transmission capacity that is 5.5 times greater and a transmission distance of almost two times longer than existing "SpectralWave DW4200" equipment using the same transmission route. 


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