Nokia Bell Labs recently announced that its researchers set a world record for the highest single-carrier bit rate on 80 kilometers of standard single-mode fiber, with a maximum of 1.52Tbit/s, equivalent to transmitting 1.5 million YouTube videos simultaneously, 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 IoT and consumer applications.
“It’s been 50 years since the invention of low-loss fibers and related optical devices,” said Marcus Weldon, Nokia’s chief technology officer and president of Nokia Bell Labs. From the original 45Mbit/s system to today’s 1Tbit/s system, it has grown more than 20,000 times in 40 years, creating the foundation 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 limits that may be possible. Our latest world record for optical research proves once again that we are inventing faster and more powerful networks that will lay the foundationfor the next industrial revolution. “
The Nokia Bell Lab optical network research team, led by Fred Buchali, has created a single-carrier bit rate of up to 1.52Tbit/s. This record was established by using a brand new 128Gigasample/second converter that can generate signals at 128Gbaud symbol rates and information rates of more than 6.0 bits/symbols/polarization for individual symbols. The achievement broke the team’s record of 1.3Tbit/s set in September 2019.
Nokia Bell Labresearcher Di Che and his team also set a new data rate world record for DML lasers. DML lasers are critical for low-cost, high-speed applications such as data center connectivity. The DML team achieved a world record data transfer rate of more than 400 Gbit/s over a 15km link.
In addition, researchers at Nokia Bell Labs have recently made other significant achievements in the field of optical communications.
The researchers Roland Ryf and the SDM team completed the first field test using air-divided multiplexing (SDM) technology on a 4-core coupling core fiber over a 2,000-kilometer span. Experiments show that the coupling core fiber is technically feasible, has a high transmission performance, while maintaining the industry standard 125um cladding diameter.
The team, led by Rene-Jean Essiambre, Roland Ryf and Murali Kodialam, introduced a new modulation format that provides improved linear and nonlinear transmission performance at 10,000km of ocean floor distance. The transmission format is generated by a neural network and can be significantly superior to the traditional format (QPSK) used in today’s cable systems.
Researcher Junho Cho and his team demonstrated experimentally that the capacity of the cable system could be increased by 23% by using neural networks to optimize the gain shaping filter to achieve capacity gain in the event of limited power supply.
Nokia Bell Labs is committed to designing and building the future of optical communication systems, driving the development of physics, materials science, mathematics, software and optics to create new networks that adapt to changing changes and go far beyond today’s limits.