Set a new industry record and complete the verification of 3820km transmission in the current network of single-wave 400Gbit/s DWDM system in China.

CTOnews.com news on January 20, according to FiberHome official news, in January 2023, China Telecom Research Institute United FiberHome successfully realized 400Gbit / s DWDM system existing network 3820km ultra-long-distance real-time transmission, transmission capacity reached 16Tbit / s, significantly refreshing the existing network 400Gbit / s DWDM system industry transmission record, marking an important step towards large-scale commercial use of the backbone 400Gbit / s DWDM system.

CTOnews.com learned that this transmission verification is based on China Telecom Guangzhou-Shanghai-Guangzhou 3820km all G.654.E land trunk optical cable, only through EDFA optical amplification to achieve one-hop direct.

According to reports, the new generation of 400Gbit / s commercial equipment uses the highest baud rate (107GBaud) line module that can be mass-produced in the industry, combined with high-gain SD-FEC technology, Nyquist subcarrier and probabilistic constellation shaping technology, to improve 2dB transmission performance compared with the previous generation 400Gbit / s system. Within the spectral width of C-band 4.8THz, the 118.75GHz channel spacing is divided, and the 40-channel 16Tbit / s super-large capacity transmission is realized. At the same time, the system supports Crunl band and can achieve 80 × 400Gbit / s 32Tbit / s super-large transmission capacity.