Dictionary

Regenerated means - to improve a place or system, especially by making it more active or successful

Fibre means noun
1 [C] any of the thread-like parts which form plant or artificial material and which can be made into cloth:
The fibres are woven into fabric.

2 [C or U] threads when they are in a mass that can be used for making products such as cloth and rope:
Natural fibres such as cotton tend to be cooler.
artificial/man-made/natural fibre

3 [C or U] one of various thread-like structures in the body, such as those found in muscle:
muscle fibre(s)

If you want to describe link of computer also said optical fibre (noun [C])
a long thin glass rod through which very large amounts of information can be sent in the form of light

Depends on which enviroment to describe what things
Because fibre can describe a cloth's fibre or computer wire.
I hope those can help.

Regenerated fibre means (textiles) Textile fiber produced by dissolving a natural material (such as cellulose), then regenerating it by extrusion and precipitation, as with viscose.

Hope can be of assistance to you.