Communicating with light polarization
A new and novel way of communicating over fiber optics is being developed by physicists supported by the Office of Naval Research. Rather than using the amplitude and frequency of electromagnetic waves, they’re using the polarization of the wave to carry the signal. Such a method offers a novel and elegant method of secure communication over fiber optic lines.
Electromagnetic waves, like light and radio waves, have amplitude (wave height), frequency (how often the wave crests each second), and polarization (the plane in which the wave moves). Changes in amplitude and frequency have long been used to carry information (AM radio uses changes in the amplitude of radio waves; FM radio uses changes in their frequency), but polarization has not been so thoroughly explored.
Gail S. Cleere | EurekAlert!
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