One optical fiber: 13.5 billion people talk at the same time China has reached a new level in the field of optical communication system research

On February 4, the Wuhan Research Institute of Posts and Telecommunications said that it has realized the first optical transmission system experiment of 560Tbit/s ultra-large capacity wavelength division multiplexing and space division multiplexing in China, which can realize 6.
75 billion pairs of people (13.
5 billion people) on one optical fiber at
the same time.
This marks a new step in the field of "ultra-large capacity, ultra-long distance, ultra-high speed" optical communication system research in China
.

In this experiment, a single-mode seven-core optical fiber with independent intellectual property rights was used as the transmission medium
.
Unlike ordinary optical fibers, a single-mode seven-core fiber is equivalent to seven ordinary fibers in one
.
The person in charge of the Wuhan Postal Science Institute said that if the optical fiber information transmission is analogous to a highway, and the ordinary optical fiber is a single lane, then the single-mode seven-core optical fiber is equivalent to seven parallel lanes, which can provide 7 times the transmission capacity
of ordinary optical fiber.
Through technological and technological breakthroughs, single-mode seven-core fiber solves the problem of crosstalk between multi-core fibers, and the isolation reaches -70dB, minimizing the interference and influence between "lanes" and "lanes
".

While innovating the transmission medium, the system equipment used in this experiment uses 16 single light sources, and the single-core transmission capacity is 80Tbit/s through the optical multicarrier generation device, and the total transmission capacity of the system reaches 560Tbit/s
.
According to reports, after the test and verification of the expert group, the "560Tbit/s ultra-large capacity single-mode multi-core fiber optical transmission system" realized this time is the first time in China and has reached the international advanced level
.

With the rapid rise of mobile Internet, cloud computing, big data, and Internet of Things applications, the surge in traffic has brought great challenges to information and communication networks, and solving the problem of "blowout growth" of network data flows is becoming a competitive highland
in the global information and communication field.
As the core R&D base in the field of optical communication in China, Wuhan Institute of Postal Sciences has continuously made major scientific and technological breakthroughs
in the field of "ultra-large capacity, ultra-high speed and ultra-long distance" optical communication transmission in recent years.
In 2014, the first ordinary single-mode optical fiber C+L band 100.
3Tbit/s capacity transmission experiment was realized, and in 2015, the transmission capacity exceeded 200Tbit/s, and the commercial practice of "three super" technology was successful
in the same year.