A team of researchers in China has built the world's first commercial optical fibre cable that works like a three lane highway for data. Instead of sending information through a single core, the new fibre contains three separate pathways inside one strand. That triples the amount of data it can carry without needing to dig up roads or lay new cables.
Three cores, one cable, much more speed
The fibre was developed by a team led by Professor Li Tangjun at the Beijing University of Posts and Telecommunications. The group worked with a company called YOFC, one of China's biggest fibre optic manufacturers. Together they produced a cable that fits three cores into the standard outer diameter of a normal fibre. That means existing underground ducts and pipelines can hold the new cable without any extra construction.
Why this matters for cities and data centres
The cable was installed on a live commercial network in Beijing. Local telecom operators and internet service providers are interested because the fibre can handle the growing demand for streaming, cloud computing, and 5G traffic. For residents and businesses in crowded Chinese cities, this could mean faster connections and fewer slowdowns during peak hours. The technology also reduces the need for expensive urban excavation, which is a major concern in dense metropolitan areas.
How it works and what comes next
Standard optical fibres use a single glass core to carry light signals. The new design uses three cores arranged in a triangle, each capable of transmitting data independently. The team had to solve problems with signal interference between the cores and develop new ways to connect the cable to existing equipment. The cable has passed reliability tests and is now in commercial use. The researchers say the same approach could be scaled to even more cores in future versions.
This is not a lab experiment. It is a working cable on a real network in China's capital. The achievement shows that incremental changes to existing infrastructure can sometimes deliver big leaps in performance. For a world that runs on data, a three lane fibre might be exactly what the information highway needed.
