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Characterizing High-Speed Transmitters: The Emphasis Is on Waveforms

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The basic fiber-based communications system consists of a laser transmitter which converts electrical data to intensity-modulated light, a fiber optic cable as short as a few meters or as long as 100-plus kilometers, and a photodetector that converts the information on the light back to an electrical signal.

Greg D. Le Cheminant, Agilent Technologies

An indicator of how well the entire system performs is a measurement called bit-error-ratio (BER). Acceptable BERs range from one error per billion to one per trillion bits transmitted. It is rare for a newly designed system to operate at these performance levels at initial turn on. Prior to system...Read full article

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