Low-noise erbium-doped fibre amplifier at 1.54 µm

evidence

Supports the 1987 demonstration of practical low-noise erbium-doped fibre amplification by two independent groups, and its consequence for submarine systems — optical amplification instead of electronic regeneration. V55 verification basis: NOT read. The retrieved results attributed the 1987 demonstration to the Southampton group and to Bell Labs and named the researchers; the journal volume and page numbers are deliberately omitted because they were not checked, and the priority question between the two groups is not adjudicated here.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.