Researchers send 661 Tbit/s through single optical fibre

tirsdag 04 sep 18


Hao Hu
DTU Fotonik
45 25 37 83


Leif Katsuo Oxenløwe
Professor, Gruppeleder
DTU Fotonik
45 25 37 84


Toshio Morioka
DTU Fotonik
45 25 37 96


The research has been published in Nature Photonics, and made more popular by another News and Views article in Nature Photonics:

”Single-source chip-based frequency comb enabling extreme parallel data transmission”: Link

”Integrated combs drive extreme data rates”: Link

A team of researchers from DTU Fotonik and coworkers from Japan, including Fujikura Ltd. and NTT Corporation, have demonstrated a chip-based optical frequency comb source and successfully transmitted 661 Tbit/s data through a single optical fibre. This is equivalent to more than the total internet traffic today and a world-record data rate generated from a chip-based single source.

As a result, compact optical frequency comb generators (a single source that simultaneously emits multiple regularly spaced wavelengths) are being investigated as an alternative to ever-larger arrays of discrete wavelength-division multiplexing (WDM) lasers. An optical frequency comb source that is coherently modulated in time, frequency and phase, and parallel multiplexed or bundled into a superchannel using WDM, polarization-division multiplexing (PDM), spatial-division multiplexing (SDM) is illustrated in the figure above.

This work is an important step towards realizing compact, energy- and cost-efficient terabit and petabit transceivers and fibre optic links that scale with future Internet traffic capacity.

Future generations of extreme capacity links will benefit from approaches such as that reported by Hu and colleagues to efficiently keep up with the exploding capacity of the Internet and its global energy consumption.