Optical Networking: Past and Future
Light-based methods have been used for information transmission for thousands of years. Probably the earliest method is the fires that have been used for signaling since Biblical times.Smoke signals have been used for communications for a long time, most notably by Native Americans. Lanterns hung in Boston’s Old North Church (“One if by land, and two if by sea”) figure prominently in Paul Revere’s famous midnight ride in 1775.
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