Method and apparatus for determining maximum gain of raman fiber amplifier

Abstract

The present disclosure relates to a technical field of optical communication, and provides a method and an apparatus for determining maximum gain of Raman fiber amplifier. Wherein the method includes obtaining transmission performance parameters of a current optical fiber transmission line; respectively obtaining impact factors A, A, Aaccording to a distance between a joint and a pump source, a fiber loss coefficient, and a fiber length included in the transmission performance parameters; calculating a joint loss value Attaccording to a distance between a joint and a pump source, a fiber loss coefficient, and looking up impact factor Aaccording to Att; determining an actual maximum gain which may actually be achieved by the Raman fiber amplifier according to A, A, A, A. The actual maximum gain obtained in the present disclosure is the maximum gain that may be achieved over all input power ranges, and the original signal in system is kept to operate at a fixed gain, such that a gain locking effect is realized, and fluctuation of existing transmission signal power caused by signal change in transmission fiber link is avoided.