The core principle of modern optical communications using
guided light can be traced back to the 19th century when Daniel
Colladan, a Swiss Physicist demonstrated this effect in 1841. By the
mid-20th century copper wires were well established as a wave-
guide for telecommunication purposes. However, using copper
wires to transmit signals proved to be rather expensive and the
performance of the signal was limited by the amount of fre-
quencies that could be used