The first 55-mode transmission with a record speed of 1.53 petabits per second in a standard diameter optical fiber.
A team of Japanese researchers from network research institute from NICT (National Institute of Information and Communication TechnologyRecord new throughput in a standard optical fiber diameter (0.125 mm): 1.53 petabits per second. To put this value into perspective, all internet traffic in the world averages 1 petabit (i.e. 1,000 terabits or 1,000,000 gigabits) per second.
To achieve such a bandwidth, the researchers encoded the data at 55 different optical frequencies, a technique called multiplexing. The goal is to take advantage of the different frequencies of light in the spectrum to increase the amount of distinct fluxes. Concretely, this record indicates a spectral efficiency of 332 bits per second per hertz (bits/sec/Hz). This is more than three times the efficiency of the December 2020 record (105 bits/sec/Hz).
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The researchers were able to transmit C-band information across 184 different wavelengths. So the device modifies the light to send 55 distinct data streams (modes). After modification, only one fiber optic core is needed to transmit all the data. At the output, the receiver decodes different wavelengths and different modes. In this experiment, the distance between the transmitter and receiver is 25.9 kilometers.
Recently, you may have read articles about Record 1.84 petabits per second 7.9 km. This bandwidth was achieved by scientists at the Technical University of Denmark in Copenhagen. But their record packs a light slice of experimental design.
You can consult NICT . press release For more technical details. Finally, note that this record was achieved in collaboration with Nokia Bell Labs (US), the Prysmian Group (Prysmian, France and the Netherlands) and the University of Queensland (Australia).
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