摘要
研究了色散补偿后光纤链路的非线性对脉冲波形及频谱演化的影响。首次得出了非线性薛定谔ＮＬＳ方程的适用于弱或强非线性色散光纤的两种级数解，可分别描述在弱非线性色散光纤中的频谱演化，和在强非线性色散光纤中脉冲波形的演化。首次得出正负色散完全抵消时，适用于任意波形的输出信号的频域表达式、非线性噪声系数、无啁啾高斯脉冲展宽因子表达式和计算结果。
The evolution of pulse waveform and spectrum of a signal is studied in fiber link after dispersion compensated. Firstly get two kinds of series solution of NLS equation which suit to weakly or strongly nonlinear dispersion fibers, respectively. It can be used to describe the evolution of spectrum in the weakly nonlinear dispersion fiber, or to describe the evolution of the pulse waveform in the strongly nonlinear dispersion fiber. We can get frequency domain expression suitable for output signal of arbitrary wave form, when dispersion is compensated best. It is pointed that the effect of nonlinearity can be described as nonlinear noise coefficient. When input is Gauss pulse without chirp, the formula of the broadening factor is deduced and calculation result is given.
出处
《通信学报》
EI
CSCD
北大核心
1998年第6期1-7,共7页
Journal on Communications
关键词
非线性
噪声系数
光纤
色散补偿
光纤通信
weakly nonlinear, strongly nonlinear, Gauss pulse, nonlinear noise coefficient
