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Fiber optic transmitter

Fiber optic transmission uses the same basic elements as copper-based transmission systems. Specifically, both systems utilize transmitters and receivers and a medium by which a signal is passed from the transmitter to the receiver. In a typical fiber optic communication system, a transmitter and an amplifier are coupled together to produce and amplify a signal to be transmitted over a long distance. The optical transmitter converts an electrical signal containing data into an optical signal and transmits the signal over the optical fiber. The optical receiver then receives the signal from the optical fiber and converts the signal back to an electrical signal, recovering the original data. Optoelectronic transmitters provide an optical communication link between electronic devices such as computers. In operation, binary voltage signals are generated within a host device and input to the optoelectronic transmitter. A fiber optic transmitter includes an amplifier for sending a signal over a long distance. Such a transmitter frequently includes a laser source of a given wavelength, an optical isolator, a modulator to modulate the laser output, and an amplifier. A fiber optic transmitter typically uses a laser diode or other light emitting device (LED) to optically encode information and generate an optical output at various light wavelengths. The optical fiber connects the transmitter to a receiver which then converts the optical signal to an electrical signal. The optical fiber may be either single-mode or multi-mode.

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