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presentation_.pptx1 petabit per second fiber transmission over 50 km
This is the Topic
Who
Nippon Telegraph and Telephone Corporation (NTT)
Fujikura Ltd.
Hokkaido University
Technical University of Denmark
What
Japan’s NTT has announced an impressive speed/distance demonstration, achieving one petabit per second over a distance of 50 Km.
Why
To significantly improve the capacity of optical communication systems.
Recent figures by the Ministry of Internal Affairs and Communications indicate that broadband services, driven by FTTH (Fiber to the home) and smartphones, will continue to expand rapidly, and traffic will continue to grow at a rate of 1.2 times per year (a 10-fold increase in 10 years) for the foreseeable future.
How
NTT designed a special fiber that packed 12 cores into a single strand. Mulicore fiber isn’t new, but the company explains that current hexagonal core layouts were unsuitable for this experiment due to crosstalk. The researchers also had to create fan-in and fan-out devices suitable for their fiber.
by applying polarization multiplexed 32 QAM (quadrature amplitude modulation) digital coherent technology that capitalizes on the wave properties of light (i.e., phase and polarization) for transmitting multiple signals, NTT successfully boosted the transmission efficiency per core to more than 4 times that of conventional MCF transmission.
When
This achievement was reported as a postdeadline paper on September 20, 2012 at the European Conference and Exhibition on Optical Communications (ECOC 2012).
