Alcatel-Lucent Achieves a World Record 25.6 Terabit/s Optical Transmission

Experiments Also Yield an Unprecedented 3.2 Bits/Second Hertz (b/s/Hz) of

Spectral Efficiency

Mar 28, 2007, 01:00 ET from Alcatel-Lucent

    ANAHEIM, California, March 28 /PRNewswire-FirstCall/ -- Alcatel-Lucent
 (Euronext Paris and NYSE:   ALU) today announced in a post deadline paper
 accepted at the OFC/NFOEC conference in Anaheim, California, that combined
 research teams from the United States and France successfully transmitted a
 world record 25.6 Terabits per second (Tb/s) of optical data over a single
 fiber strand, using 160 Wavelength-Division Multiplexed (WDM) channels -
 enough bandwidth to transmit the data from more 600 DVDs per second.
 [Editor's note: A terabit is a trillion bits of data.]
     These results far surpass the previous transmission record of 14 Tb/s,
 established in September 2006.
     Alcatel-Lucent was able to leverage its researchers' skill in
 optimizing spectral efficiency in optical networks, using both wavelength
 and polarization multiplexing, and general mastery of the physical layer of
 optical networking. Also involved in this experiment were scientists from
 the National Institute of Information and Communications Technologies in
 Tokyo (NTIICT), and also from Sumitomo Osaka Cement in Chiba, Japan.
     This breakthrough in data transmission capacity adds to the company's
 long list of terrestrial and submarine optical networking research
 milestones including the world's first terabit transmission experiment,
 invention of non-zero dispersion fiber (NZDF), the first to break the 10
 Tbit/s barrier for delivering data over a single optical fiber, the largest
 capacity ever transported over transoceanic distances (6Tbit/s),
 transmission of 100 Gbit/s data over 2,000 km, introduction of the L-Band
 amplifier, the first large-effective area fiber, and the first commercial
 all-Raman amplified DWDM system.
     "Optical networking is a critical enabler of the broadband IP
 revolution we are seeing throughout the world today," said Romano Valussi,
 President of Alcatel-Lucent's Optics activities. "The experience we are
 developing in these tests will help Alcatel-Lucent design the most
 efficient, highest bandwidth systems possible to benefit our customers when
 networks of this bandwidth will be deployed."
     The experimental system transmitted 25.6Tbit/s of data through three
 80-km spans. The data used wavelength division multiplexing in both the
 C(conventional) and L(long) wavelength bands and, to double the total
 capacity, polarization multiplexing in each wavelength was employed.
 Distributed Raman amplification was used to increase the received optical
 signal-to-noise ratio and to allow the use of a single
 dispersion-compensating fiber for both bands after each span.
     Maximizing spectral efficiency, which is the amount of information that
 can be transmitted within a unit bandwidth, was also critical to realizing
 this world record. In this experiment Alcatel-Lucent's Bell Labs
 researchers in New Jersey and Alcatel-Lucent's Research and Innovation
 researchers in France used an advanced signalling format called RZ-DQPSK
 (return to zero differential quadrature phase-shift keyed) to realize a
 record-breaking 3.2 bits/second/Hertz (b/s/Hz) of spectral efficiency. This
 is a significant improvement over today's commercial systems that generally
 operate at spectral efficiencies of between 0.2 and 0.4 b/s/Hz.
     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:
     Alcatel-Lucent Press Contacts:
     Regine Coqueran
     Tel : +33-(0)1-40-76-49-24
     Stephane Lapeyrade
     Tel.: +33-(0)1-40-76-12-74
     Alcatel-Lucent Investor Relations:
     Pascal Bantegnie
     Tel: +33-(0)1-40-76-52-20
     Maria Alcon
     Tel: +33-(0)1-40-76-15-17
     John DeBono
     Tel: +1-908-582-7793

SOURCE Alcatel-Lucent