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Wideband optical signals, due to the extremely high carrier frequency. This means that the optical link can transmit information at a rate of about 1 Terabit / s. In other words, over a single fiber can simultaneously transmit 10 million phone calls and video signals million. The data rate can be increased by transmitting information in two directions, as light waves can propagate in a fiber independently. In addition, the optical fiber can propagate light signals of two different polarizations, which allows to double the capacity of optical communication channel.
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