On the Roles of Polarization and Raman-Assisted Phase Matching in Narrowband Fiber Parametric Amplifiers

This paper presents a comprehensive framework for the analysis of narrowband optical fiber parametric amplifiers. The novel vector model comprises virtually every significant nonlinear contribution, including a full stimulated Raman interaction model. We employ the model to calculate the influence of fiber random birefringence, as well as of longitudinal variations of linear and nonlinear propagation parameters on both gain and phase spectra.