China Telecom Research Institute, in collaboration with Changfei and ZTE, achieved real-time transmission of 64 Tb/s in each direction, for a total of 128 Tb/s on a 1007.48-kilometer air-core optical fiber link. One-way transmission of a kilometer signal takes only 3.43 ms. Air core optical fiber mainly allows light to travel through air channels. Compared with traditional solid core optical fiber, it can reduce latency by about 30%, and can reuse existing transmission equipment, providing a new connection solution for training, inference, and computing power network construction across data centers.

China Telecom Research Institute, in collaboration with Changfei and ZTE, achieved real-time transmission of 64 Tb/s in each direction, for a total of 128 Tb/s on a 1007.48-kilometer air-core optical fiber link. The one-way transmission of a kilometer signal takes only 3.43 ms. Air core optical fiber mainly allows light to travel through air channels. Compared with traditional solid core optical fiber, it can reduce latency by about 30%, and can reuse existing transmission equipment, providing a new connection solution for training, inference, and computing power network construction across data centers.