Tests at Alcatel-Lucent’s Innovation City campus in France result in data
speeds of 31 Terabits per second over 7200 kilometers, the highest sub-sea
capacity ever transmitted on a single optical fiber
Paris, July 16, 2013 — Alcatel-Lucent (Euronext Paris and NYSE: ALU)
has broken a new record for the amount of data that can be transmitted over
transoceanic distances on a single optical fiber.
In a test carried out at Alcatel-Lucent’s Innovation City campus in
Villarceaux near Paris, researchers from Bell Labs successfully sent data at
speeds of 31 Terabits-per-second (Tbps) over 7200km – a capacity exceeding that
of the most advanced commercial undersea cables today by a factor of three.
This was achieved with a span - the distance between amplifiers maintaining the
entire length - of 100km.
The researchers were able to achieve the highest-ever capacity for undersea
data transmission on a single fiber. The experiment leveraged Bell Labs’
pioneering work in 200 Gigabit per second (Gbps) single-carrier data channels*.
At such speeds and distances signal distortions and noise make data recovery
very challenging. To counter this problem, in this new test Bell Labs
researchers made use of innovative detection techniques and harnessed an array
of technologies in modulation, transmission, and signal processing twinned
with advanced error correcting coding.
The experiment used 155 lasers, each operating at a different frequency and
carrying 200 Gbit/s over a 50 GHz frequency grid to dramatically enhance the
performance of current WDM (Wavelength Division Multiplexing) systems, which
are today being deployed with speeds up to 100G.
Details of the experiment were presented in a post-deadline paper presented
earlier this month at Opto-Electronic Communication Conference (OECC)
conference in Japan. This record is the latest in a long series of two dozen
records over the past 15 years, all showcasing breakthroughs by Alcatel-Lucent
that have transformed long distance data transmission. Among them is the
invention of Dense Wave Division Multiplexing (DWDM), the introduction of
non-zero dispersion fiber and single-carrier coherent detection.
Philippe Keryer, Chief Strategy & Innovation Officer of Alcatel-Lucent
said: “Undersea fiber-optic transmission is integral to the digital economy,
delivering vast amounts of video and data between countries, regions and
continents. As our customers cope with increasing demand on their networks for
data capacity and higher-speeds of transmission, our researchers are
intensifying their application with tests like this to develop new technology
solutions to transform global data networks. This underlines the strategic
R&D focus we recently announced as part of The Shift Plan.”
*First presented at the ECOC (European Conference on Optical
Communications) conference in 2011