An optical communications repeater is used in a fiber-optic communications system to regenerate an optical signal. For some conditions, the output spectrum of an EDFA/OA would be distorted this has to be analyzed for various. There are two fiber optic link segments in use, the original Fiber Optic Inter-Repeater Link (FOIRL) segment, and the newer 10BASE-FL segment. The original FOIRL specification from the Ethernet standard of the early 1980s provided a link segment of up to 1000 meters between two repeaters only. 1 Connecting a computer to a 10BASE-FL segment The use of light pulses provides superior electrical isolation for equipment at. In telecommunications, a repeater is an electronic device that receives a signal and retransmits it. Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction.