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通过沃尔泰拉(Volterra)级数理论求得了非线性薛定谔方程(NLSE)的半解析解,在考虑光纤损耗、色散及非线性效应的情况下,推出了长距离在线级联掺铒光纤放大器(EDFA)光纤通信系统中信号和自发辐射噪声(ASE)之间耦合串扰的半解析表达式,得到了多跨距传输接收端输出信号和发射端输入信号之间的关系式.根据维纳(Wiener)滤波理论的时域滤波原理,在多跨距传输系统接收端设计了对非线性乘性噪声有滤波作用的维纳滤波器,并对预集总色散补偿、后集总色散补偿、分布链路色散补偿系统及一对三“跨距成比例平移对称的色散非线性同步补偿系统进行了仿真模拟研究.结果表明了提出的设计思路及方法的可行性,为进一步提高传输距离增大入纤功率提供了新的思路.
The semi-analytical solution of the nonlinear Schrödinger equation (NLSE) was obtained by the Volterra series theory. In consideration of fiber loss, dispersion and nonlinear effects, a long-distance online cascade erbium-doped fiber amplifier (EDFA) fiber-optic communication system and the spontaneous emission noise (ASE) coupling crosstalk between the semi-analytical expression obtained multi-span transmission between the receiving end of the output signal and the input signal at the transmitter. According to Wiener Wiener) filtering theory, a Wiener filter that filters non-linear multiplicative noise is designed at the receiving end of multi-span transmission system. The effects of pre-collective dispersion compensation, post-aggregate dispersion compensation, distribution Link dispersion compensation system and a pair of three ”spans symmetric dispersion-nonlinear symmetrical compensation system with span-parallel simulation results show that the proposed design ideas and methods of feasibility, in order to further increase the transmission distance increases Into fiber power provides a new idea.