Optical fibre systems-a reality at last

Optical fibre transmission systems are now starting to enter the telecommunications networks of western countries in place of coaxial or wire cable systems, after some ten to fifteen years' development. Research is still moving forward rapidly so that further generations of systems can be seen. The technology promises substantial cost reductions to the user when volume production is achieved. But who will benefit from this? The author attempts to explain the technology and provide some preliminary answers to the question.