Chinese firm Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC) announced on June 16 that it had successfully completed the world’s first field trial of hollow-core fiber (HCF) wavelength-division multiplexing (WDM) capable of 1.2 Tb/s per wavelength over an ultra-long unrepeatered span. The trial — conducted in collaboration with state-owned China Telecom and optical equipment maker Dekoli — achieved an unprecedented aggregate transmission capacity of 51.3 Tb/s over roughly 128 miles (206.5 km) without signal regeneration.
These figures, which the collaborators describe as a new world record for unrepeatered WDM capacity-distance performance without remote-pumped amplifiers, were achieved using only erbium-doped fiber amplifier amplification. The demonstration was carried out under the framework of the National Key Laboratory for Advanced Manufacturing and Application Technologies of Optical Fibers and Cables.
