Page 53 - SAMENA Trends - March 2020

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Nokia Bell Labs’ World Records and Innovations in Fiber Optics to Enable

Faster and Higher Capacity 5G Networks of the Future

Nokia Bell Labs announced that its fiber and the associated optics. From the speed applications such as datacenter
researchers have set the world record original 45 Megabit-per-second systems connections. The DML team achieved a
for the highest single carrier bit rate at to more than 1 Terabit-per-second world record data rate beyond 400 Gbit/s
1.52 Terabits per second (Tbit/s) over 80 systems of today – a more than 20,000- for links up to 15 km. In addition to these
km of standard single mode fiber -- the fold increase in 40 years – to create the world records, Nokia Bell Labs researchers
equivalent of simultaneously streaming fundamental underpinning of the internet have also recently achieved significant
1.5 million YouTube videos – which is and the digital societies as we know it. achievements in optical communications,
four times the market’s current state-of- The role of Nokia Bell Labs has always including:
the-art of approximately 400 Gigabits per been to push the envelope and redefine the • The first field trial using spatial-
second. This world record, along with other limits of what’s possible. Our latest world division-multiplexed (SDM) cable over
optical networking innovations will further records in optical research are yet another a 2,000km span of 4-core coupled-
strengthen Nokia’s ability to develop proof point that we are inventing even core fiber was achieved by researchers
networks for the 5G era that meet the faster and more robust networks that will Roland Ryf and the SDM team. The
ever-growing data, capacity and latency underpin the next industrial revolution.” experiments clearly show that coupled-
demands of industrial Internet of Things The highest single-carrier bitrate at 1.52 core fibers are technically viable, offer
and consumer applications. Several of Terabits per second was set by a Nokia high transmission performance, while
these achievements were presented as Bell Labs optical research team led by maintaining an industry standard 125-
part of Nokia Bell Labs’ post deadline Fred Buchali. This record was established um cladding diameter.
research papers at the Optical Fiber by employing a new 128 Gigasample/ • A research team led by Rene-Jean
Communications Conference & Exhibition second converter enabling the generation Essiambre, Roland Ryf and Murali
(OFC) being held this week in San Diego. of signals at 128 Gbaud symbol rate and Kodialam introduced a novel new
Additionally, Nokia Bell Labs researcher information rates of the individual symbols set of modulation formats that
Di Che was awarded the OFC Tingye Li beyond 6.0 bits/symbol/polarization. This provide improved linear and nonlinear
Innovation Prize. Named after the late accomplishment breaks the team’s own transmission performance at submarine
Tingye Li, a Bell Labs luminary in the field of record of 1.3 Tbit/s set in September distances of 10,000 km. The proposed
optical communications, the prize is given 2019 while supporting Nokia’s record- transmission formats are generated by
to an early career professional who has breaking field trial with Etisalat. Nokia a neuronal network and can significantly
demonstrated innovation in their research. Bell Labs researcher Di Che and team outperform traditional formats (QPSK)
Marcus Weldon, Nokia CTO and President also set a new data-rate world record for used in today’s submarine systems.
of Nokia Bell Labs, said: “It has been fifty directly modulated lasers (DML), which • Researcher Junho Cho and team
years since the inventions of the low-loss are crucially important for low-cost, high- experimentally demonstrated capacity
gains of 23% for submarine cable
systems that operate under electrical
supply power constraints. The capacity
gains were achieved by optimizing
the gain shaping filters using neural
networks.
The researchers that achieved the world
record and research results are part of
Nokia Bell Labs’ Smart Optical Fabric &
Devices Research Lab, which designs and
builds the future of optical communications
systems, pushing the state-of-the-art in
physics, materials science, math, software
and optics to create new networks that
adapt to changing conditions and go far
beyond today’s limitations.

53 MARCH 2020