| 摘要 |
<p>An optical transmission system comprises an optical transmitter, an optical power amplifier, an optical preamplifier and an optical receiver which are connected by optical fibers in turn. The system also comprises a remote pumping amplifier connecting with the optical power amplifier and the optical preamplifier in series, a remote pumping unit connecting with the optical fiber provided between the optical power amplifier and the optical preamplifier, which supplies the remote pumping light to the remote pumping amplifier, so that the light signal in the remote pumping amplify unit is amplified, and the Raman pumping unit connecting with the optical fiber provided between the optical power amplifier and the optical preamplifier, which provides the Raman pumping light. The system can extend the repeaterless distance. For the system with the repeaters, the system can also reduce the number of the repeaters.</p> |
