How is an electrical A/V signal converted to an optical A/V signal?
An electrical A/V signal is converted to an optical A/V signal using an optical transmitter or an electrical-to-optical converter. The optical transmitter uses a laser diode as a light source and varies the intensity of the laser light according to the electrical signal. For an analog signal, the light source intensity varies with the voltage or current of the electrical signal. For digital signals, the light intensity is high or low to represent logical ones or zeros.
