Fu Songnian, Chen Chen, Gao Fan, Li Xiaolei, Deng Lei, Tang Ming, Liu Deming
Opt Lett. 2018 Apr 1;43(7):1495-1498. doi: 10.1364/OL.43.001495.
We experimentally demonstrate single-lane 112 Gb/s four-level pulse-amplitude modulation signal transmission over 80 km standard single-mode fiber (SSMF) by digital chromatic dispersion (CD) pre-management. By theoretically investigating the interplay between CD and self-phase modulation (SPM) during the SSMF transmission, we identify that the SPM induced impairment can be optically mitigated by the residual positive CD of the SSMF link. Thanks to the digital CD pre-management for the purpose of both CD compensation and nonlinear impairment mitigation, a simplified Volterra filter equalizer is good enough to achieve bit error rate below the 7% hard-decision forward error correcting threshold.
我们通过数字色度色散（CD）预管理，在80公里标准单模光纤（SSMF）上实验演示了单通道112 Gb/s四电平脉冲幅度调制信号传输。通过理论研究SSMF传输过程中CD与自相位调制（SPM）之间的相互作用，我们发现SSMF链路的残余正CD可以光学减轻SPM引起的损伤。由于数字CD预管理兼具CD补偿和减轻非线性损伤的目的，一个简化的沃尔泰拉滤波器均衡器足以实现低于7%硬判决前向纠错阈值的误码率。
