An optical repeater is used in a fiber optical communications system to regenerate an optical signal. Such repeaters are used to extend the reach of optical communications links by overcoming loss due to attenuation of the optical fiber. Some repeaters also correct for distortion of the optical signal by converting it to an electrical signal, processing that electrical signal and then retransmitting an optical signal.
The optical repeater is designed to solve problems of weak mobile signal in the place that is far away from the Base Station and has fiber optic cable network underground. The system consists of two parts: Master Unit (MU) and Remote Unit (RU). The MU captures the Base Station signal via direct coupler close to Base Station, then converts it into optic signal and transmits the amplified signal to the RU via fiber optic cable. The RU will reconvert the optic signal into RF signal and provide the signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and retransmitted to the Base Station via the opposite direction.
