| 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 th e 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 th e transmission signal. The central frequency, Fsign, of the transmission signa l of the signal laser (14) and the central frequency, Fpump, of the pump signa l of the pump laser (18) are such that (Fpump.plusmn.20MHz)- (Fsign.plusmn.20MHz)=10GHz.plusmn.0.1GHz, and the two lasers are controlled locally such that the maximum variation .DELTA.fsign, of the central frequen cy of the transmission signal, the maximum variation, .DELTA.fpump, of the central frequency of the pump signal, and the bandwidth, Bfsign, of the transmission signal have the following relationship Bfsign + .DELTA.fsign + .DELTA.fpump= 100MHz.
|
