Performance characterization of high gain, high output power and low noise cascaded broadband discrete Raman amplifiers

Abstract

In this paper, gain, noise and nonlinear performance characterization of cascaded broadband discrete Raman amplifiers with different gain fibre combinations is presented. We numerically demonstrate the design of a backward-pumped cascaded dual stage broadband (~70 nm) discrete Raman amplifier with high gain (~19 dB), low noise (~ 6 dB noise figure) and lower nonlinear penalty by optimizing two different types of gain fibres.