The experiment breaks the current transmission record in multimode fiber of 2.5%.
Scientists at the Network System Research Institute of the National Institute of Information and Communication Technologies (NICT, Japan) achieved the world’s first transmission exceeding 1 petabit per second (125,000 Gbit / s) in single-core multimode optical fiber . This beats the current transmission record in multimode fiber by 2.5 times.
Until now, transmission tests in optical fibers supporting a large number of modes have been limited to low optical data transfer capacities. “In this investigation, we have shown the possibility of combining a highly spectral and efficient broadband optical transmission with an optical fiber handling 15 fiber modes and having a cladding measurement conforming to the current industry standard of 0.125 mm. “, wrote the specialists in an affirmation.
To conduct their test, the scientists built a broadband handset subsystem to transmit and receive a few hundred WDM (Wavelength Division Multiplexing) channels with deep spectral efficiency and high signal quality. It was this transmission frame which used multimode fiber which showed the record transmission speed.
While increasing the number of modes in a multimode fiber transmission framework, the necessary MIMO (Multi-Input Multi-Output) computational complexity increases the processing of the computerized signal. Nevertheless, the transmission fiber used had a small modular carryover, simplifying MIMO complexity and maintaining this low modular carryover over a huge optical data transfer capacity. Subsequently, we were able to showcase the transmission of 382 wavelength channels, each modulated with 64-QAM signals, âthe analysts said.
Completion of this test is expected to advance high limit multimode transmission technology for future high limit optical transmission systems. At present, specialists plan to extend the distance of high-capacity multi-mode transmission and integrate it with multi-core technology to lay the foundation for innovation in optical transmission with increased capacity.
This experience was published at the 46th European Conference on Optical Communication, one of the world’s largest conferences on fiber-optic communication.