DISTRIBUTED RAMAN AMPLIFIER MODULE AUTO-SETUP

摘要

The invention is directed to a method for automatic set up of Raman gain within an optical transmission fibre adapted to carry a number of optical transmission channels and having at least one optical pump operable to cause the fibre to exhibit Rama n amplification. The method involves modulating the power of the optical pump or pumps, detecting the effect of the modulation on the gain of each transmission channel and then adjusting the power of the pump or pumps in dependence on the effect detecte d. The invention is also directed to apparatus for performing this method.