Bidirectional fiber amplifier for pipeline fiber safety early warning system

The utility model discloses a bidirectional fiber amplifier for a pipeline fiber safety early warning system. The bidirectional fiber amplifier comprises a coupler, an Er-doped fiber, a pump light source, a temperature controller, a gain controller and a processor, wherein the FC interface of the pump light source is connected with the FC interface of the coupler through the Er-doped fiber, the temperature controller is electrically connected with the pump light source, the gain controller is electrically connected with the pump light source, the processor is respectively electrically connected with the temperature controller and the gain controller, and the processor controls the temperature of the pump light source through the temperature controller and controls currents flowing through the pump light source through the gain controller.