Technology:
A research team led
by Masataka Nakazawa of Tohoku University developed a new technology to centuple
the communications traffic of an optical fiber line that connects major cities.
The new technology is based on the optical wave pattern that an American
researcher predicted mathematically more than 80 years ago. It increases
information amount per optical fiber dramatically by modifying the optical
signals that contain information to a unique wave pattern. A wave pattern has a
big mountain that represents a signal, and the new technology adds a wave
pattern that nulls its amplitude to the foundation of the mountain at regular
intervals. It can increase information amount only by reinforcing the existing
communications network.
The new technology
can transmit 1 terabit per second that is 100 times more than the amount
transmittable by the current technology for each wevelength. The research team
experimented it using the standard optical fiber and light with a wevelength of
1.5 micrometers and found that information was transmitted correctly and
precisely for a distance of 500 km. The basic trunks connecting major cities
may suffer from communication failure in five years because the rapid spread of
smartphones and cloud computing services has been increasing communications
traffic of the optical fiber line by more than 40% annually. It is urgently
required to increase communications traffic per optical fiber to avoid the
possible failure. The research team plans to put the new technology into
practical use in five years in alliance with private companies.
Optical fibers. A
new technology to increase the
communications traffic of an optical fiber is strongly desired.
communications traffic of an optical fiber is strongly desired.
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