Mateo Eduardo F, Zhou Xiang, Li Guifang
CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA.
Opt Express. 2011 Jan 17;19(2):570-83. doi: 10.1364/OE.19.000570.
An improved split-step method (SSM) for digital backward propagation (DBP) applicable to wavelength-division multiplexed (WDM) transmission with polarization-division multiplexing (PDM) is presented. A coupled system of nonlinear partial differential equations, derived from the Manakov equations, is used for DBP. The above system enables the implementation of DBP on a channel-by-channel basis, where only the effect of phase-mismatched four-wave mixing (FWM) is neglected. A novel formulation of the SSM for PDM-WDM systems is presented where new terms are included in the nonlinear step to account for inter-polarization mixing effects. In addition, the effect of inter-channel walk-off is included. This substantially reduces the computational load compared to the conventional SSM.
提出了一种改进的分裂步长法（SSM）用于数字反向传播（DBP），该方法适用于具有偏振复用（PDM）的波分复用（WDM）传输。由马纳科夫方程推导得到的非线性偏微分方程组用于DBP。上述系统能够逐通道实现DBP，其中仅忽略了相位失配四波混频（FWM）的影响。提出了一种适用于PDM-WDM系统的SSM新公式，其中在非线性步长中包含了新的项以考虑偏振间混合效应。此外，还考虑了通道间走离效应。与传统的SSM相比，这大大降低了计算量。
