High-order Nonlinearity Influence on Performances of High Rate Soliton Communication System and its Suppression Method

Abstract

The propagation equation is established to investigate the feasibility and the validity of the suppression of the soliton self-frequency shift(SSFS) in the picosecond and femtosecond soliton communication system employing a compound control method of time domain and frequency domain . By the use of the variational approach, the evolution of the chirping Gaussian quasi-soliton pulse is analyzed in the presence of intrapulse Raman scattering. The self-frequency shift(SFS) is eliminated by an up frequency-guiding filter control method. The soliton perturbation method is employed to study the steady-state solutions in the presence of intrapulse Raman scattering. The relation between the transmission performances of the soliton and the system construction parameters such as 3dB-temporal width of the modulator, center frequency and bandwidth of the filter is deduced and a stable transmission condition is revealed. The long-haul soliton transmission system without SSFS at the rate of 160 Gb/s is designed and its performance is numerically simulated. The simulation results are in well within accordance with our theoretical analysis.