NEC Sets High-Density DWDM Transmission Capacity Record.
(Seems like there's a new record claimed every couple weeks anymore)
6.4 Terabit (6Tb/s) Ultra High Density DWDM Transmission Doubles Previous Top Speed
HERNDON, Va., Oct. 3 /PRNewswire/ --
NEC Corporation (Nasdaq: NIPNY) has announced that it has set what it believes to be a new industry record in high-density DWDM (Dense Wavelength Division Multiplexing) capacity transmission -- successfully transmitting 6.4Tb/s (40Gb/S - 160CH) over a single 186km fiber.
This is nearly twice the 3.28Tb/s transmission capacity that was previously considered by NEC to be the maximum capacity. The record-setting, ultra high-speed optical-transmission test transmitted the data equivalent of 1 million motion pictures over a single fiber at one time.
NEC announced the test results Sept. 7 at the European Community Optical Communication Conference (ECOC) in Munich, Germany.
"NEC is clearly a leader in the field of optical networks and this breakthrough technology should enable NEC to provide cost-effective photonic solutions with unprecedented, industry-leading capacity to carriers in the very near future," said Dr. Milorad Cvijetic, chief technical officer, NEC America, Inc., Public Networks Group.
Increasing demand, due to an exponential increase in Internet users, has meant larger telecommunication pipelines are needed worldwide. To meet this increasing demand, new transport systems using DWDM have been introduced to increase overall transmission capacities.
Breaking the 3Tb/s capacity barrier required several new techniques. As well as new multiplexing/demultiplexing technologies, the higher bit rate transmission technology in one wavelength required high-speed integrated circuits as well as integrated circuit assembly technology and system integration technology. NEC, one of the world's leading network technologies and semiconductor companies, is well equipped to develop these technologies.
These new integrated circuit-design, circuit-assembly and system-integration technologies were made possible through several technical breakthroughs, including:
-- Development of polarization interleave multiplexers and
wavelength/polarization demultiplexers with automatic polarization
controllers, which made 2 times of wavelength multiplexing
(0.8bit/s/Hz) available.
-- Development of 40G/s optical receivers using gallium arsenic (GaAs)
heterobipolar transisters (HBT-IC), quadrupling transmission capacity
as compared to contemporary 10G/s systems.
-- Technology to reduce Polarization Mode Dispersion (PMD) to below 0.8ps
achieving a 186km distance by reducing of optical amplifier and
optical fiber polarization dependencies.
Together, these technologies made it possible to achieve a wavelength/polarization mux/demux of 40Gb/s signal with 50GHz spacing and 6.4Tb/s (40Gb/s -160 CH) transmission over 186KM.
This work was partly supported by Telecommunication Advancement Organization of Japan.
About NEC America
NEC America, Inc., an affiliate of NEC Corporation, develops, manufactures and markets a complete line of advanced communication products and software for public and private networks. NEC America's Public Networks Group provides SONET transmission systems, optical networking systems, network management systems, digital loop carrier products and ATM switching and routing products. NEC Corporation and its affiliates worldwide are a 48 billion leader whose 154,000 employees are dedicated to providing leading edge technologies, products and solutions.
For more information contact NEC America's Public Networks Group at 800-433-2745 or visit their web site at www.necpng.com. |
