[henrikeh]

Yes. At least a general trend of increasing the demonstrated transmission rates year after year.

In the past five to ten years, there has however been a discussion of wether this can continue and if we hit upon the speculate “capacity crunch“ – aka reaching the operational fiber capacity. This is all considering a single fiber strand.

The limit to the rate through the fiber is not well understood and a quite active research area. Previously, the “limit” has been broken by technology shifts, such as coherent transmission, different amplifier technology, more advanced signal processing. The big question is what the next big shift will be. Combs, as presented in the article are a promising direction.