A Modified Adaptive DBP for DP 16-QAM Coherent Optical System

作者：Yao, Haitao^*; Li, Wei; Han, Jilong; He, Zhixue; Yuan, Zhilin; Hu, Qianggao; Yang, Qi; Yu, Shaohua

来源：IEEE Photonics Technology Letters, 2016, 28(22): 2511-2514.

DOI：10.1109/LPT.2016.2601933

• Coherent optical communication
• digital back-propagation
• nonlinear effect
• interpolation
• dual-polarization 16-ary quadrature amplitude modulation

A modified adaptive digital backpropagation (A-DBP) algorithm based on intensity variance is proposed in this letter. In the simulation, a 25-GBd dual-polarization 16-quadrature amplitude modulation transmission system with a transmission distance of 2000 km is established to investigate the performance of the proposed A-DBP. The simulation results show that the proposed A-DBP can dynamically estimate the optimal fiber nonlinear coefficient gamma(opt) and achieve comparable or even better performance than the DBP with full knowledge of fiber. Moreover, the proposed A-DBP can achieve better performance compared with the previous A-DBP based on intensity variance. Moreover, the proposed A-DBP requires fewer iterations to determine gamma(opt) compared with the previous A-DBP based on intensity or phase variance.

• 出版日期2016-11-15
• 单位华中科技大学