Abstract: An optical fiber transmission system comprising a transmitter and a receiver at the two ends of an optical fiber. The transmitter comprises a signal laser for generation of a transmission signal and the receiver comprises a pump laser for production of a pump signal, which is incorporated in the fiber in a direction opposite to that of the transmission signal to obtain amplification using the Brillouin effect of the transmission signal. The central frequency, Fsign, of the transmission signal of the signal laser and the central frequency, Fpump, of the pump signal of the pump laser are such that (Fpump±20 MHz)?(Fsign±20 MHz)=10 GHZ±0.1 GHz, and the two lasers are controlled locally such that the maximum variation, ?fsign, of the central frequency of the transmission signal, the maximum variation, ?fpump, of the central frequency of the pump signal, and the bandwidth, Bfsign, of the transmission signal have the following relationship: Bfsign+?fsign+?fpump=100 MHz.