有源光放大器链路中交叉相位调制的不稳定性

Cross-phase modulational instability in fiber link with an active optical amplifier

利用两种方法研究了有源放大器波分复用系统光纤链路中交叉相位调制的不稳定性 .首先利用非线性薛定谔耦合方程 ,在小幅度扰动下 ,研究了正常色散和反常色散光纤中的交叉相位调制不稳定性 .由于相位噪声涨落 ,利用分裂步长傅里叶变换法与Monte_Carlo法 ,模拟了有源放大器链路中反常色散和正常色散情况下的调制不稳定性 .

In this paper,analytical and numerical methods are used to study cross-phase modulational instability. Firstly,by use of coupled nonlinear Schrdinger equation,we have studied the cross-phase modulation instability in the normal and anomalous dispersion fiber links of wavelength division multiplexed system with an active amplifier,when the amplitude is perturbed. Secondly,making use of the split step Fourier transform and Monte-Carlo method,we simulated the cross-phase modulation instability in active normal and anomalous dispersion fibers with fluctuation of phase noise. Comparison between the above methods shows that the results agree with each other.