Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm.
Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm.
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DOI：
10.1364/oe.19.009453
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发表时间：
2011-05
期刊：
影响因子：
3.8
通讯作者：
D. Rafique;Marco Mussolin;M. Forzati;J. Mårtensson;Mohsan N. Chugtai;A. Ellis
中科院分区：
文献类型：
--
作者：
D. Rafique;Marco Mussolin;M. Forzati;J. Mårtensson;Mohsan N. Chugtai;A. Ellis
我们研究了一种数字反向传播简化方法，使计算效率高的数字非线性补偿的相干检测112 Gb/s的偏振复用正交相移键控传输超过1,600公里的链路（20 × 80公里），没有内联补偿。通过数值模拟，我们报告高达80%的减少所需的反向传播步骤进行非线性补偿，在标准的反向传播算法相比。该方法考虑到在给定时刻使用加权平均方法的相邻符号之间的相关性，并且优化非线性补偿器级的位置以实现实际的数字反向传播。
We investigate a digital back-propagation simplification method to enable computationally-efficient digital nonlinearity compensation for a coherently-detected 112 Gb/s polarization multiplexed quadrature phase shifted keying transmission over a 1,600 km link (20 x 80 km) with no inline compensation. Through numerical simulation, we report up to 80% reduction in required back-propagation steps to perform nonlinear compensation, in comparison to the standard back-propagation algorithm. This method takes into account the correlation between adjacent symbols at a given instant using a weighted-average approach, and optimization of the position of nonlinear compensator stage to enable practical digital back-propagation.