OPTICAL FIBER COMMUNICATION SYSTEMS WITH BRILLOUIN EFFECT AMPLIFICATION

摘要

An optical fiber transmission system 10 comprising a transmitter 11 and a receiver 12 at the two ends of an optical fiber 13. The transmitter comprises a signal laser 14 for generation of a transmission signal and the receiver comprises a pump laser 18 for production of a pump signal, which is incorporated in the fiber 13 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 14 and the central frequency, Fpump, of the pump signal of the pump laser 18 are such that Fpump±20MHz- Fsign±20MHz=10GHz±0.1GHz, and the two lasers are controlled locally such that the maximum variation DELTAfsign, of the central frequency of the transmission signal, the maximum variation, DELTAfpump, of the central frequency of the pump signal, and the bandwidth, Bfsign, of the transmission signal have the following relationship Bfsign + DELTAfsign + DELTAfpump= 100MHz.