Early Optical Fibre transmission systems 20 Metre fibre bundle transmission system 1967 20 metre optical fibre bundle made by Richard Epworth 1967 1973 Video transmission system. GaAs swan-cavity Laser, Single Multimode fibre, Pulse Position Modulation, Avalanche photodiode. 1973 World's first commercial fibre transmission system - Customer: Dorset Police HQ 34 Mbit/second fibre transmission system Block diagram of 34 Mbit/second fibre transmission system
