Intermodal Four-Wave Mixing In A Higher-Order-Mode Fiber

Abstract

Much effort has gone into the study of silica and its material properties due to its importance in long distance communication. Especially, the propagation of optical pulses in single-mode fibers and their interplay with nonlinear effects have been modeled with good accuracy. This thesis first presents a derivation of a frequency-domain Generalized Nonlinear Shrödinger Equation that has been used in the simulation of nonlinear phenomena relating to ultrashort pulses in single-mode fibers. It then develops an even more general approach and shows in detail how it can be used to successfully model the results of an experiment in which high-efficiency intermodal four-wave mixing in a higher-order-mode (or few-mode) fiber was observed. A formulation that can model interactions between vector-polarized modes is also covered.