Study On Four Wave Mixing In Optical Orthogonal Frequency Division Multiplexing System Based On Volterra Series

With the use of the Internet is gradually increased, the application of high flow forward higher and new requirements for the network transmission rate, the optical fiber communication system to100Gbit/s or even higher transmission rate evolution. One of the high-speed optical fiber communication system as Optical Orthogonal Frequency Division Multiplexing(OOFDM) technology due to its high rate of resistance to dispersion spectrum, the advantages, attracted extensive research enthusiasm. In this paper, fiber nonlinear effect on Optical Orthogonal Frequency Division Multiplexing system signal transmission quality were studied, especially for the most important effection:Four Wave Mixing (FWM) effect.In this paper, Volterra series Transfer Function model of nonlinear Schrodinger equation was used to study Optical Orthogonal Frequency Division Multiplexing system. The approximate solution is obtained propagation equation contains linear term and nonlinear term, and then based on the defination of the four wave mixing effect, isolated the expression of four wave mixing effect on Optical Orthogonal Frequency Division Multiplexing system. The expression to represent the Four Wave Mixing in Optical Orthogonal Frequency Division Multiplexing system was obtained, with considering dispersion and phase mismatch. The results of computer simulation show that the power of Four Wave Mixing products are different from each other, and Four Wave Mixing effect in a certain subcarrier only derives its adjoining subcarriers, the effect of other subcarriers could be ignored. So in practical application, the expression of Four Wave Mixing in Optical Orthogonal Frequency Division Multiplexing system could be simplified, to reduce the computational complexity, and provides a theoretical basis for the optimization of Volterra series transfer function design of optical orthogonal frequency division multiplexing system.