General Electric fabrique une fibre optique de 40km. 

The rush to explore the capabilities of light was on… But, it wasn't until 1970, when scientists working at Corning, developed an optical fiber so pure that it had less attenuation (loss of signal) than its copper counterpart. By 1981, we had developed the ability to draw strands of glass that were 25 miles long.

Willy Aubert