Researchers Successfully Achieve 1 Tbps Transmission Rate Over Standard One-Fiber Link

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1 Tbps Tranmission Rate

Researchers from Nokia Bell Labs, Deutsche Telekom and Technical University of Munich have successfully achieved 1 Tbps transmission rate over a single standard fiber optic channel. This new research does not involve multiple lasers and fiber optic lines in order to achieve high-speed transmission. Instead, they used a clever way of transmitting data to increase transmission speed.

With the ever increasing demand for data, communication networks are slowly experiencing bottlenecks due to limited bandwidths in existing networks. Although the current fiber optic connection offer fast transmission, they are still limited with speeds between 1Gbps to 100 Gbps.

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Terabit or multi-terabit transmissions are achievable by implementing multiple lasers and fiber optic lines for transmission. Sometimes, even a special kind of fiber optic cable needs to be used in order to achieve this feat.

The new research only employs a clever way of utilizing the fiber optic line rather than using additional equipment to achieve high-speed data transfer. In this scheme, the transmission uses what is called the Probabilistic Constellation Shaping on quadrature amplitude modulated signals.

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TUM researchers (l-r) Fabian Steiner, Georg B?cherer, and Patrick Schulte with the statue of Claude Shannon, father of information theory ? Image: Denise Panyik-Dale/Alcatel-Lucent

TUM researchers (l-r) Fabian Steiner, Georg B?cherer, and Patrick Schulte with the statue of Claude Shannon, father of information theory ? Image: Denise Panyik-Dale/Alcatel-Lucent

Quadrature Amplitude Modulation or QAM is a type of hybrid modulation technique. It involves modulating analog signals of a certain frequency with digital data. This type of modulation creates a constellation or ?map? of possible combinations of amplitudes and frequencies. The PCS or Probabilistic Constellation Shaping uses this map in a much more efficient way. Depending on the load of a fiber channel, this new scheme optimizes the signals by using high-amplitude low-frequency signals in order to increase noise immunity. By increasing noise immunity, it, in effect, increases the rate of transmission.

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This new technology can promise a sustained 1Tbps transmission rate. A value that is a lot closer to the maximum theoretical transmission rate of a fiber optic cable. Apart from this, this scheme does not involve modifications on the existing communications infrastructure. The only thing that needs to be done is a minor ?firmware? upgrade from telecommunications providers. This would also mean that implementation will be easier and faster than performing major hardware upgrades.

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As technology progresses, more and more people are becoming reliant on being well informed. Gathering information with the use of the internet is slowly becoming a necessity for a lot of people. Year after year, new devices and applications are being created that make use of data and data transmission. Before long, existing communications infrastructures will become saturated. These new developments that help improve existing technologies are vital for technological progress.

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