Research on the all-optical wavelength conversion based on FWM in ROF systems

The all-optical wavelength conversion based on FWM in radio over fiber (ROF) system is theoretically analyzed. Based on the analysis of the all-optical wavelength conversion in high-nonlinear fiber, main factors related to the conversion efficiency are presented. Methods to increase the conversion efficiency are discussed. With the longer high-nonlinear fiber, the higher nonlinear coefficient, the appropriate power of the pump, the appropriate polarization between the signal and the bump, and high efficiency to implement the wavelength conversion can be achieved. The theoretical analysis is verified by the simulation results.