core fiber test pushes internet speeds to 1.2Tb/s

Key Points:

• Chinese telecom and fiber-optics companies, including China Telecom, Yangtze Optical Fibre, and Dekoli, successfully demonstrated the world’s first field trial of a hollow-core fiber transmission system delivering 1.2Tb/s per wavelength over a 128-mile cross-border cable without signal repeaters.
• The hollow-core fiber technology, which transmits light through air rather than solid glass, reduces signal delay and enhances network capacity, making it promising for next-generation optical networks and large-scale data centers.
• The project overcame previous challenges in high-power signal transmission in real-world hollow-core fiber networks by implementing an adaptive per-wavelength rate control and flexible channel power allocation, optimizing data transmission across multiple channels.
• A novel high-power amplifier design using cascaded dual-gain units and multi-element doping improved signal amplification efficiency, stability, and output power up to 33.5 dBm, supporting robust long-distance transmission.
• Enhanced safety features, including optical-path power anomaly detection and automatic shutdown mechanisms, were integrated to monitor and protect the system against faults, ensuring operational reliability in high-power optical transmission environments.