Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizen OC_Formula for the clue delivery! CTOnews.com news on November 14, after reaching a new 1.84Pbit / s record for optical fiber communication, the communication rate of using standard cladding diameter optical fiber has also ushered in a major breakthrough, achieving a transmission rate of 1.53 Pbit / s at 25.9km, creating a new world record.

This result was created by a team of researchers at the Network Research Institute of the National Institute of Information and Communication Technology (NICT, Japan), who achieved a bandwidth of about 1.53 Pb per second by encoding information at 55 different optical frequencies (a technique called multiplexing).

This bandwidth is enough to carry the entire world's Internet traffic over a single fiber-optic cable, 1 million times higher than the gigabit fiber rate used by the average user.

According to reports, because each color in the spectrum (visible light and invisible light) has its own frequency, which is different from all other colors, it can carry its own independent information flow. The researchers managed to unlock the spectral efficiency of 332 bits / s / Hz (bits per second / hertz), three times higher than the 2019 experiment, which achieved a spectral efficiency of 105 bits / s / Hz.

The researchers managed to transmit information simultaneously on the C-band at 184 different wavelengths. Before transmitting over a fiber-optic cable, light is modulated to transmit 55 separate data streams (mode). After modulation, a glass core is needed to transmit all data. When the data is sent, the receiver decodes different wavelengths and modes, and in the experiment, the distance between the sender and the receiver is set to 25.9 km.

CTOnews.com learned that NICT said that in the future, it will further explore transmission capacity by expanding the frequency band, as well as the basic technologies needed for long-distance transmission and network deployment. The results of the experiment were accepted as a post-deadline paper report at the 48th European Optical Communication Conference (ECOC 2022) and published on Thursday, September 22, 2022 local time.

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