A research team led by the China Information Communication Technologies Group (CICT) has achieved a new world record in optical fiber transmission. The experiment reached a bidirectional real-time capacity of 3.2 Pb/s using multi-core fiber technology.
The project involved collaboration between the CICT State Key Laboratory of Optical Communication Technologies and Networks, Peng Cheng Laboratory, and FiberHome Fujikura Fiber Optic Technology. The team utilized a 10.3-kilometer 24-core fiber setup to conduct the test.
The system integrates S+C+L band multiplexing with space-division multiplexing to create thousands of parallel transmission channels. This architecture allows for a total capacity 32 times higher than traditional C+L band commercial single-core G.652 fiber systems, which are limited to approximately 100 Tb/s.
The transmission system uses commercial coherent optical modules and high-order probabilistic shaping modulation. It achieved real-time verification of 400G per wavelength in the S-band and 1.2 Tb/s per wavelength in the C+L bands, effectively addressing capacity limitations in current networks.
