Nonlinearity compensation using optical phase conjugation deployed in discretely amplified transmission systems.
Nonlinearity compensation using optical phase conjugation deployed in discretely amplified transmission systems.
复制标题
DOI：
10.1364/oe.26.023945
复制
发表时间：
2018-08
期刊：
影响因子：
3.8
通讯作者：
M. Al-Khateeb;M. McCarthy;C. Sánchez;A. Ellis
中科院分区：
文献类型：
--
作者：
M. Al-Khateeb;M. McCarthy;C. Sánchez;A. Ellis
我们引入了一个封闭形式方程，通过仿真和实验结果验证，该方程可以预测中链路OPC辅助离散放大系统中的剩余非线性噪声比。该模型预计，随着调制信号带宽的增加，中链路OPC实现的性能增强将减少。数值分析表明，未补偿的信号相互作用限制了引入额外的opc所实现的性能改进。数值分析表明，较短的放大器间距将会带来更大的性能提升。在100km放大间隔的离散放大系统中，对2x、4x和8x28Gbaud中链路OPC补偿的PM-QPSK系统进行了实验测试，验证了数值结果。实验获得的到达增强（2x28Gbaud， 4x28Gbaud和8x28Gbaud分别为43%，32%和24%）证实了中链路OPC的补偿效率高度依赖于沿系统传播的信道数量（带宽）。
We introduce a closed form equation, validated by simulations and experimental results that predicts the residual nonlinear noise ratio in mid-link OPC assisted discretely amplified systems. The model anticipates the reduction in performance enhancement achieved by mid-link OPC as the bandwidth of the modulated signals increases. The numerical analysis shows that uncompensated signal-signal interactions limit the performance improvement achieved by the introduction of additional OPCs. The numerical analysis predicts that the deployment of shorter amplifier spacing will lead to a greater performance enhancement. The numerical results are validated by experimentally testing of 2x, 4x, and 8x28Gbaud PM-QPSK systems with mid-link OPC compensation in a discretely amplified system with 100km amplifier spacing. The experimentally obtained reach enhancement (43%, 32%, and 24% for 2x28Gbaud, 4x28Gbaud, and 8x28Gbaud, respectively) confirms that the compensation efficiency of mid-link OPC is highly dependent on the number of channels (bandwidth) propagating along the system.