The father of fiber optics passed away today

For anyone who wonders what about Charles Kuen Kao (高錕):

... Despite Kapany's work, the loss of signal over long distances via optical glass fibre was a recurring problem. What Kao did was work out how to fix this problem, and calculate how to transmit light over long distances. It was Kapany's work which led to the fabrication of the first ultrapure fibre in 1970. This was a game-changer in modern communication systems. ...

https://www.ibtimes.co.in/narinder-singh-kapany-passes-away-...