China Telecom Research Institute, YOFC and ZTE have jointly completed the world’s first bidirectional real‑time transmission test over a 1007.48‑km hollow‑core fiber link.

Running over extended C+L‑band, the trial delivered 800 Gb/s per wavelength with a total capacity of 128 Tb/s, setting a new global distance benchmark for hollow‑core fiber real‑time transmission. The team solved gas‑line absorption issues and validated system stability under extreme operation scenarios.

This milestone provides solid technical support for building high‑bandwidth, long‑haul and low‑latency backbone networks for computing‑power infrastructure. China Telecom will keep cooperating with industry partners to advance hollow‑core fiber commercialization for digital economy development.

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