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Anaheim, USA, March 28, 2007 - Alcatel-Lucent (Euronext Paris
and NYSE: ALU) today announced that it has successfully demonstrated the
potential for upgrading existing 40Gbit/s transparent long-haul transport
networks to 100Gbit/s Ethernet; the use of coherent detection instead of
conventional direct detection for unmatched resistance to fiber impairments at
40Gbit/s; the ability to receive and convert serial 107 Gbit/s optical data
into lower rate data streams; and the first WDM transmission of channels based
on serial binary modulation format exploiting full Electronics Time Domain
Division Multiplexing (ETDM). These important optical networking
milestones have been presented in several post deadline papers by
Alcatel-Lucent’s Bell Labs and Research and Innovation teams at the OFC/NFOEC
conference in Anaheim, California this week.
In the first experiment, Alcatel-Lucent’s Bell Labs researchers in New
Jersey successfully transmitted ten closely spaced 100 Gbit/s WDM data channels
over a 1,200 kilometer optical transmission distance in a systems experiment
that included six optical add/drop nodes like those used in today’s transparent
mesh networks. Using this design, the researchers achieved an unprecedented
spectral efficiency of 1 bit per second per Hertz (b/s/Hz) over the 1200 Km
distance using only a single polarization of light. These results demonstrate
the practicality of effectively doubling the throughput of today’s commercially
deployed optical networks, using WDM channel spacings that are typical of
existing and deployed 40G networks using optical and electronic components
developed for the 40G market.
Also demonstrated and presented in a post-deadline paper was a project by
researchers at Alcatel-Lucent’s Research and Innovation center in Paris on the
use of coherent detection to contain distortion and dispersion which happen
when sending WDM channels at 40Gbit/s rate over links designed for 10Gbit/s
rate. The use of coherent detection instead of conventional direct detection
makes the introduction of promising techniques easier, such as using
polarisation division multiplexing on top of wavelength division multiplexing,
making possible to generate data at 40Gbit/s with just 10Gsymbol/s rate. Based
on this approach, an ultra long-transmission over 4080 km has been demonstrated
for the first time, highlighting unmatched resistance to fiber impairments,
namely PMD and chromatic dispersion, when compared to all other 40Gbit/s
proposed solutions.
In a third post-deadline paper, researchers at Alcatel-Lucent’s Bell Labs in
New Jersey also demonstrated the ability to receive and convert serial 107
Gbit/s optical data into lower rate data streams with the first fully
integrated 107 Gbit/s demultiplexing optical receiver. This optical
receiver is unique in that it integrates a 100-Gb/s photodetector with a 1:2
electronic demultiplexer in a single high-speed package. At such high speeds,
packaging these two components in an integrated fashion allows for superior
performance compared to having separate photodetector and demultiplexer
modules. This is a significant step towards the commercial realization of 100
Gbit/s serial transmission systems. Such a compact receiver transforms
ultra-high speed optical signals to data rates that are much more manageable in
the electrical domain.
In a fourth post-deadline paper, Alcatel-Lucent’s Research and Innovation
researchers from Stuttgart demonstrated the Wavelength Division Multiplexing
(WDM) transmission of 10 channels, each carrying 107Gbit/s bit rate information
over 480km. After a recent single-channel demonstration, this is the first WDM
transmission of channels based on serial binary modulation format exploiting
full Electronics Time Domain Division Multiplexing (ETDM), both at the
transmitter and receiver sides. It is based on advanced research electronic
circuits operating at the full line rate. This approach, complementary to the
previous ones, prepares the longer-term introduction of 100 Gbit/s systems.
About Alcatel-Lucent
Alcatel-Lucent (Euronext Paris and NYSE: ALU) provides solutions that enable
service providers, enterprises and governments worldwide, to deliver voice,
data and video communication services to end-users. As a leader in fixed,
mobile and converged broadband networking, IP technologies, applications, and
services, Alcatel-Lucent offers the end-to-end solutions that enable compelling
communications services for people at home, at work and on the move. With
operations in more than 130 countries, Alcatel-Lucent is a local partner with
global reach. The company has the most experienced global services team in the
industry, and one of the largest research, technology and innovation
organizations in the telecommunications industry. Alcatel-Lucent achieved
adjusted proforma revenues of Euro 18.3 billion in 2006 and is incorporated in
France, with executive offices located in Paris. [All figures exclude impact of
activities to be transferred to Thales]. For more information, visit
Alcatel-Lucent on the Internet: http://www.alcatel-lucent.com
Contact the Alcatel-Lucent Press Office: press@alcatel-lucent.com
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