All-optical networks

Abstract

Fiber optics will become more efficient as light waves replace electrons for processing signals in communication networks. To fulfill its potential, fiber optics must do more than simply replace copper telephone wiring with thin, cylindrical conduits of glass that guide light. Optical transmission must in fact go beyond the limitations imposed by the electronics technology that preceded it. It would be simpler, faster and more economical to transfer an optical signal from one end of a network to the other by using the properties of the light wave itself to route the transmission along different pathways through the network. This all-optical network would build on the successes of fiber-optics networks currently deployed commercially that rely on optoelectronic components for signal processing. All-optical communications will, for years to come, face competition from electronic communications, whose price continues to drop while its performance improves. Nevertheless, an all-optical network offers compelling advantages. It would provide so much capacity that the exchange of video and large computer files would become routine. A video camcorder owner could plug the camera into a cable wall outlet and have relatives across the country participate in a child's birthday through video linkages. ln fact, one can only begin to imagine the uses for a network in which bandwidth becomes as inexpensive as electricity, gas or water.