Fibre Optics: Light Speed Travel in the Tiniest of Tunnels
On This Day in (Engineering) History April 22, 1977 - Optical fibre used to carry live telephone traffic for the first time A warm, sunny spring day in Long Beach, California. Someone is phoning the doctor, the insurance company or a relative from their apartment. Twenty-four hours ago, nothing would have been special about this call. Yesterday, the phone company funnelled calls through a copper coaxial cable. Today is different. Today, April 22, 1977 a fibre-optic telephone system has gone live, and it is not an experiment. At its core Fibre-optics involves the marriage of technologies to create a new, third technology. In simple terms, the idea is to put a beam of light down a tiny glass tube and send it over a distance. The light doesn't leak from the tube because of what is called…