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通过数值解非线性耦合薛定谔方程 ,研究高速光孤子通信系统中高阶色散和偏振模色散对孤子传输的影响 ,并数值模拟孤子在单模光纤中的演变。研究结果表明 :偏振模色散导致孤子脉冲展宽、峰值功率下降、峰值点随传输距离漂移 ;高阶色散和偏振模色散使孤子加速展宽、脉冲沿出现非对称的振荡结构 ,脉冲峰值点随传输距离的漂移而发生改变
The influence of high-order dispersion and polarization mode dispersion on the soliton transmission in high-speed optical soliton communication system is investigated by numerical solution of nonlinear coupled Schrödinger equation, and the evolution of soliton in single-mode optical fiber is numerically simulated. The results show that the polarization mode dispersion leads to the broadening of the soliton pulse and the decrease of the peak power, and the peak point shifts with the transmission distance. The high-order dispersion and the polarization mode dispersion accelerate the soliton to broaden its width and the asymmetrical oscillation structure appears along the pulse edge. The drift changes