Bell Labs breaks optical transmission record, 100 Petabit per second kilometer barrier
This transmission experiment involved sending the equivalent of 400 DVDs per second over 7,000 kilometers, roughly the distance between Paris and Chicago. This is the highest capacity ever achieved in a transoceanic distance and represents an increase that exceeds the most advanced of today’s commercial submarine cables by a factor of ten. To achieve these record results of researchers at Bell Labs made innovative use of new detection techniques and draw on a wide range of technologies of modulation, transmission and signal processing
The high-speed optical transmission is a key component of Alcatel-Lucent High exploit the network architecture, the key elements of which have already been selected by leading service providers.
To achieve these record results from researchers at Bell Labs facilities in Villarceaux, France used 155 lasers, each operating at a different frequency and up to 100 gigabits of data per second, to dramatically improve the performance of Standard Wavelength Division Multiplexing (WDM) technology.
“There is no doubt that this break the record of transfer is a milestone in terms of network capacity and speed and a major step forward in meeting the current explosion in demand,” said Gee Rittenhouse, head of Bell Research Labs. “This is an excellent example of Bell Labs research excellence, and demonstrates the ability of our researchers to solve complex problems,” he said.
The record figure was derived by multiplying the number of lasers for its 100 Gigabit per second transmission rate and then multiply the total of 15.5 Terabit per second output by the distance of 7000 kilometers performed. The combination of speed and distance is expressed in bits per second.kilometers is a standard measure for high-speed optical transmission.
The broadcasts were conducted over a network whose repeaters, devices used to maintain the intensity of the optical signal over long distances, were separated by 90 kilometers away. This separation distance is 20% higher than that usually holds in such networks. The challenge of maintaining transmission over these distances were significantly greater in these experiments by noise, disturbance signals, which presents as increased transmission speeds.
The researchers also increased interconnection capacity advanced digital signal processors with coherent detection, a new technology that allows data acquisition to a greater number of properties of light that the direct detection method commonly applied in the present systems . With this technique the researchers were able to effectively increase the capacity to increase the number of light sources onto a single fiber introduced and still separating light into its constituent colors when he reached his destination.
Details of progress were presented in a research paper which was reviewed in an exclusive and highly competitive time period after CPB 2009, European Optical Communications prestigious conference.
This record of transmission is only the latest in a long series of Bell Labs optical networking developments that have become the foreign exchange market solutions and generate substantial growth opportunities for Alcatel-Lucent: The Invention of Dense Wave Division Multiplexing (DWDM), introduction of non-zero dispersion fiber, 100 Gigabit Ethernet field trials and Differential Phase-Shift Keying (DPSK) to 40 Gigabits per second, the most used in 40 Gigabit per second worldwide systems.
Provided by Alcatel-Lucent
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