Lasers enable internet backbone via satellite

Optical data communications lasers can transmit several tens of terabits per second, despite a huge amount of disruptive air turbulence. ETH Zurich scientists and their European partners demonstrated this capacity with lasers between the mountain peak, Jungfraujoch, and the city of Bern in Switzerland. This will soon eliminate the necessity of expensive deep-sea cables.

Illustration of the optical data communication lasers between Bern and the Jungfraujoch.
The researchers tested data transmission by laser over 53 kilometres from the Jungfraujoch to Zimmerwald near Bern. (Photograph: ETH Zurich)

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