China claims 3.2Pb/s fibre record outside the lab

A Chinese research collaboration says it has achieved a real-time optical-fibre transmission speed of 3.2 petabits per second across a 24-core cable. The result would be enough to support millions of gigabit broadband households at once, although it remains a research demonstration rather than a consumer broadband upgrade. ¹

The Hubei Provincial Department of Economy and Information Technology says the team combined researchers from China Information and Communication Technologies Group, Pengcheng Laboratory and Fiberhome Fujikura Fiber Optic Technology. Its test surpassed the same group's 2.5Pb/s result from earlier this year. ¹

Tom's Hardware reports that the new result is almost 30% faster than the previous record. The test used spatial-division multiplexing and S+C+L multi-band transmission across commercially compliant hardware architectures, according to the report. ²

The numbers are difficult to picture. The official account compares the capacity with more than 20,000 4K films per second, while a more practical comparison is simultaneous gigabit service for roughly 3.2 million households. Those figures describe aggregate capacity, not a single home connection suddenly becoming millions of times faster. ¹

Why it matters

The achievement sits between a laboratory curiosity and a deployable network product. Tom's Hardware notes that other academic experiments have reached higher speeds using more specialised equipment, but says this test's real-time operation and commercially compliant architecture could make the result more relevant to future backbone networks. ²

Our opinion

The record is exciting because it attacks a real bottleneck: moving data between increasingly hungry AI and cloud systems. It is not a promise that British broadband customers will see 3.2Pb/s next year. The hard part now is turning a controlled demonstration into reliable, affordable infrastructure that can be operated outside a research environment. ¹²