Recently, Nokia Bell Labs announced that its researchers set a world record for the highest single-carrier bit rate on a standard single-mode optical fiber of 80 kilometers, with a maximum of 1.52 Tbit/s, which is equivalent to transmitting 1.5 million YouTube videos at the same time. It is four times the current 400G technology. This world record and other optical network innovations will further enhance Nokia’s ability to develop 5G networks to meet the data, capacity, and latency needs of industrial Internet of Things and consumer applications.
Marcus Weldon, Chief Technology Officer of Nokia and President of Nokia Bell Labs, said: “Since the invention of low-loss optical fibers and related optical devices 50 years ago. From the initial 45Mbit/s system to today’s 1Tbit/s system, It has increased more than 20,000 times in 40 years and created the basis of what we know as the Internet and the digital society. The role of Nokia Bell Labs has always been to challenge the limits and redefine the possible limits. Our latest world record in optical research proves once again We are inventing faster and more powerful networks to lay the foundation for the next industrial revolution.”The Nokia Bell Labs Optical Network Research Group led by Fred Buchali created a single carrier bit rate of up to 1.52Tbit/s. This record is established by using a brand new 128Gigasample/second converter that can generate signals at a symbol rate of 128Gbaud, and the information rate of a single symbol exceeds 6.0 bits/symbol/polarization. This achievement broke the 1.3Tbit/s record created by the team in September 2019.
Nokia Bell Labs researcher Di Che and his team have also set a new world data rate record for DML lasers. DML lasers are essential for low-cost, high-speed applications such as data center connections. The DML team achieved a data transmission rate of over 400 Gbit/s over a 15-km link, setting a world record.In addition, researchers at Nokia Bell
Labs have recently made other major achievements in the field of optical communications.
Researchers Roland Ryf and the SDM team completed the first field test using space division multiplexing (SDM) technology on a 4-core coupled-core fiber spanning 2,000 kilometers. The experiment proves that the coupling core fiber is technically feasible and has high transmission performance, while maintaining the industry standard 125um cladding diameter.
The research team led by Rene-Jean Essiambre, Roland Ryf and Murali Kodialam introduced a new set of modulation formats that can provide improved linear and non-linear transmission performance at a submarine distance of 10,000km. The transmission format is generated by a neural network and can be significantly better than the traditional format (QPSK) used in today’s submarine cable systems.
Researcher Junho Cho and his team have proved through experiments that in the case of limited power supply, by using a neural network to optimize the gain shaping filter to achieve capacity gain, the capacity of the submarine cable system can be increased by 23%.
Nokia Bell Labs is dedicated to designing and building the future of optical communication systems, driving the development of physics, materials science, mathematics, software, and optical technologies to create new networks that adapt to changing conditions, and far beyond today’s limits .
Post time: Jun-30-2020