China develops optic fibers that can carry 30 billion simultaneous phone calls
Global Times

Chinese researchers have developed an optic fiber that can carry 30 billion phone calls simultaneously, making the country one of the leaders in the ultra-high speed data transmission field.


(File Photo: VCG)

The transmission rate is said to have reached 1.06 petabyte per second, almost twice as fast as the previous limit of 560 terabytes per second achieved by the researchers in 2017.

The experiment was recently carried out by researchers at the national key laboratory of optical fiber communication technology and network in Wuhan, Central China's Hubei Province.

The experiment is a breakthrough in the domain of "ultra-high capacity, ultra-long distance and ultra-high speed" optical communication, stated a press release sent to the Global Times by the State-owned telecommunication giant China Information and Communication Technologies Group Corp (CICT), which funded the experiment.

A domestically developed special optical fiber with single mode and 19 cores was used in the experiment, increasing transmission capacity 10 times greater than the maximum capacity provided by current commercial use single-mode optical fiber, the news release said.

The 2017 record was reached when adopting fiber with seven cores, and more cores basically means more tunnels available for information transmission, Li Shengtang, the company's spokesperson, told the Global Times on Wednesday.

"As data communication shows explosive growth, there is massive pressure on existing infrastructure networks. The 'three ultra' optical transmission provided a solution, and an adequate foundation for the coming 5G era," He Zhixue, a PhD researcher with the laboratory and a leading member for the experiment, told the Global Times.

He predicted the market demand for the three-ultra optical transmission will skyrocket in five to 10 years.

A new homegrown chip made from silicon-based material was also used in the experiment. It transforms electrical signals into optical signal at the sending end and returned them to electrical ones at the receiving end, according to the researcher.

He noted that the transmission capacity achieved during the experiment indicates the country has entered the top five in the field.