Gain and Noise Properties of Bidirectional EDFAs

摘要

The rate equation model is setup for the signal gain, pump absorption and output noise spectrum of bidirectional EDFA ( Bi-EDFA) including numbers of signals, pumps of arbitrary direction, amplified spontaneous emission (ASE) and inherent loss. The influence of erbium-doped fiber length, input signal power, pump style and pump power on the gain characteristics of Bi-EDFA is analyzed. Forward and backward noise figure for different pump style versus bidirectional input signal power is investigated.