In this paper the potentiality of nonlinear effects mitigation by increasing of optical fiber core diameter was investigated. The numerical simulation of return to zero differential quadrature phase shift keying optical signals propagation taking into account nonlinear effects was performed. As result the Q-factor dependence from effective mode diameter was obtained for different signal parameters. The results of optical fiber synthesis with given parameters are represented.
In this paper cross-phase modulation in mutichannel dispersion managed soliton systems was investigated. Method for evolution of main optical soliton parameters for two-channel WDM systems based on variatonal approach was proposed. Results of soliton propagation simulation in communication lines with different dispersion maps are represented and comparison with numerical method was carried out.
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