Studies On Pulse Propagation In Fiber Raman Amplifier

Fiber Raman amplifier (FRA) has been recognized as an ideal choice for the next-generation optical amplifier, so it is a promising research area. In these years, the research on continuous wave Fiber Raman amplifier has been well developed; at the same time, the pulse Fiber Raman amplifier is also attracting more and more researchers.In this dissertation, some research has been done on Fiber Raman amplifiers, from the CW FRA to the pump FRA, from theory to experiment.The main points are as follows:1. The history of optical communication and optical amplifier is recalled; the recent status and trend of Fiber Raman amplifier is discussed;2. The essential theory is summarized; the characters of FRA and different configuration are explained; the models of CW FRA and pump FRA are analyzed; the Raman threshold is discussed;3. One method is proposed to resolve the Boundary Value Problem of ordinary differential equation group and some simulation has been done according to this method; also the effects of different parameters are discussed; and then both of these processes are made use of to study the feasibility of considering photonic crystal fiber as one candidate of Raman fiber;4. Simulation research has been done on the pulse expanse, nonlinear fiber optics and their interactions; meanwhile, the same kind of research have been done on the fiber Raman amplifiers, which still includes dispersion compensation, pulse amplification in FRA and elementary discussion of chirp pulse;5. Raman gain efficiency is tested and experimental research have also been done on the pulse expanse, self-phase modulation, stimulated Brillouin Scattering and so on; at last, the dispersion compensation and Raman amplification of DCF Raman amplifier are testified.