多扰动影响下的滤波控制色散管理孤子系统

为了分析和抑制色散管理孤子在长距离、多信道系统中传输存在的多种扰动因素,采用变分法解析了信道放大自发辐射噪声、信号间串扰等多种因素对系统的影响,研究了在线滤波器控制色散管理孤子的频率漂移和定时抖动的能力。结果表明,合理优化配置滤波器与色散管理孤子参数能够稳定色散管理孤子幅度和脉宽参数,抑制各个扰动对系统的影响,其中以交叉相位调制-自发辐射扰动减低最为明显,然后分别是自发辐射噪声和交叉相位调制。这种最佳的滤波选择方案能为估计高速大容量系统传输性能提供参考。

The multi-perturbation effects in filter control of dispersion managed soliton system

In order to analyze and restrain the multi-perturbation in the ultra long-haul multi-channel dispersion managed soliton(DMS) transmission system,the effect of perturbation including the amplifier spontaneous emission(ASE) noise,intra-symbol interference(ISI) between the channels is analyzed by variational method.The control capability of inline filter in restraining the frequency shifting and timing jitter of DMS is also studied.The analysis results indicate that the filters can stabilize amplitude and pulse-width of DMS and restraining the effects of multi-perturbations.There exists an optimal configure scheme of filter strength and parameters of DMS.The perturbation of cross-phase modulation(XPM)-ASE is obviously decreased by filter,then the perturbation of ASE noise and XPM.The results and the optimal scheme of filter control can be taken as a reference in estimating performance of high-speed and big capacity system.