The optical transmitter is the realization of the electro / optical conversion Guangduan ji. It consists of light source, driver and modulator consists of its function is to come from the electric machine electric signal to the light emitted from the light modulation, a modulated light wave, and then the modulated optical signals are coupled to an optical fiber or cable to transmit. Electric machine is a conventional electronic communication equipment.

( 2) optical receiver

The light receiver is to realize the optical / electrical converter Guangduan ji. It consists of a light detector and optical amplifier. Its function is to transmit optical fiber or cable to the optical signal, the optical detector is converted into electrical signals, and then, the weak electrical signals are amplified by an

amplifying circuit to a sufficient level, to the receiving end of the electrical terminal drain to.

( 3) optical fiber or cable

Optical fiber or optical cable optical transmission path. Its function is to sending a modulated optical signal, the optical fiber or cable for long distance transmission, the receiving