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40 Gbps Optical Fiber Transmission System for Next Generation optical Network. [ 03:33 ]
As we depend on digital information to be transferred across the globe, the need for speed, capacity and reliability has exploded. Fiber optics is one method being used to solve this problem. It is so fast and has such a large potential transmission capacity that, in theory, just a handful of optical fibers can potentially carry enough bandwidth to transmit the sum of all data transmission needs for the entire planet.
THE CHALLENGE
NEC’s Optical Network engineers have been working on a dream: a device which can transmit such large amounts of data at sufficient speeds, capacity and flexibility – without disruption or distortion.
THE SOLUTION
NEC has now made that a reality.
NEC’s solution is the 40G ROADM – a Reconfigurable Optical Add/Drop Multiplexer. It is one of the fastest and smallest multiplexers in the world for optical fiber transmission in commercial use - transmitting the equivalent of 1,000 Hollywood films in a single second.
THE TECHNOLOGY
The multiplexer allows up to eighty signals to be transmitted simultaneously on different optical wavelengths without interfering with each other. Electronic data are converted into optical signals at one end and reconverted at the other. Between the transmitter and receiver is a switching device – the add/drop – which allows individual wavelengths to be added or removed without interrupting the transmission of the other wavelengths. This is invaluable when switching to a new destination.
Yoshiaki Aono Assistant Manager Optical Network Division NEC;
“In order to transmit such large data, we are using a new technology called RZ-DPSK which transmits fiber optic signals in a crystal clear way – and on the receiving side, we have developed a new technology which compensates dispersion.
This is an unprecedented new technology which has continuously been developed at NEC’s Central Research Laboratories.
THE BENEFIT
This revolutionary solution has unlimited applications for the next generation network –not only high capacity data transmission for businesses, but also for consumers who will benefit from new applications which support the simultaneous use of fixed line terminals and mobile phones, such as video conferencing.
Yoshiaki Aono Assistant Manager Optical Network Division NEC;
“The benefit of 40G ROADM is that it enables the expansion of large networks, upon which new applications can be made, with significant cost effectiveness.
And these new applications will be less expensive, safer and more convenient for users.”
Thanks to NEC and 40G ROADM, communication has made a quantum leap into the future.
- 1Mbps
- 500Kbps
Overview
Optical Networking Solution (40G ROADM)
Japan today is witnessing a rapid expansion in broadband services mainly due to the introduction of fiber to the home (FTTH) and other networks. With the further introduction of new services such as internet TV and FMC (Fixed-Mobile Convergence), there will be an accelerated increase in the audio, video and data traffic. This new digital revolution will require a secure and flexible backbone network that offer higher speed and that can carry massive data.
In order to meet these changing needs, NEC developed a cutting-edge new solution, the ROADM - a “revolutionary breakthrough” in fiber optics. ROADM which stands for Reconfigurable Optical Add/Drop Multiplexer is a multiplexer which allows for the remote control of wavelengths. This optical transmission system now makes it possible to transmit signals over long distances, both at high volumes and high speeds. Relying on NEC’s latest technological innovation, ROADM is capable of transmitting 40 gigabits per second – four times that of traditional networks speeds - and can transmit up to 80 separate wavelengths simultaneously. This speed is equivalent to the instantaneous transmission of 1000 Hollywood movies per second.
Currently, ROADM is actively being utilized in Japan’s expanding optical fiber network infrastructure The latest model of 40G ROADM has adapted the latest LSI technology developed at NEC’s Central Research Laboratories and this has successfully resolved the issues of wavelength distortion which had been a recurring issue in existing high-speed optical transmissions. Not only does this world-class innovation quickly resolve the problem of eliminating distortion at optimal high speeds, this technology amazingly realizes both stable and high quality long distance optical transmission at a stricking speed of 40 gigabits per second,
One of the greatest advantages of 40G ROADM is that it allows a substantial expansion of fiber optic communication capabilities without requiring any change whatsoever to the existing fiber optic infrastructure. These advantages are further augmented by NEC’s unique high density packaging technology which has made the 40G ROADM one of the best compact systems in the world which also translates to minimal power consumption.
NEC’s vision for the future encompasses a long term commitment to innovation in optical communication technology which it believes will greatly contribute to the building of a safe and secure Next Generation Network (NGN).
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