| 摘要 |
<p>In a distributed Raman amplification system (figure 1, item 10), the pump laser (14) and the fiber (12) are chosen to have characteristics which result in broadening of the DRBS. For example, with a transmission fiber (12) through which signal light of a wavelength λs propagates, and having zero dispersion at a wavelength λo; a pump laser (14) producing counterpropagating pump light at a wavelength λp; where λp and λs are on opposite sides of the zero dispersion wavelength are used. The transmission fiber may be large effective area fiber. In a Raman amplification system suitable for use in a WDM optical fiber communications system, pump lasers having mode spacing which is less than the optical bandwidth of the signal channel are advantageous.</p> |
