Distributed raman amplification system

摘要

In a distributed Raman amplification system, the pump laser and the fiber are chosen so as to have characteristics which result in broadening of the DRBS. For example, with a transmission fiber through which signal light of a wavelength lambds propagates, and having zero dispersion at a wavelength lambdo; a pump laser producing counterpropagating pump light at a wavelength lambdp; where lambdp and lambds are on opposite sides of the zero dispersion wavelength is used. The transmission fiber may be large effective area fiber. In a Raman amplification system suitable for use in a WDM optical fiber communication system, pump lasers having mode spacing which is less than the optical bandwidth of the signal channel have been found to be advantageous.