100公里无色散补偿链路C波段64-Gbit/s光OOK系统的自适应信道匹配检测
Adaptive Channel-Matched Detection for C-Band 64-Gbit/s Optical OOK System over 100-km Dispersion-Uncompensated Link
AI总结：
针对100公里无色散补偿C波段64-Gbit/s光OOK系统，提出含PNLE、DFE、MLSE的自适应信道匹配检测方法，仅接收端使用即达7%硬判决前向纠错门限，创该场景纪录，为光互连提供新方案。
摘要：
本文针对100公里无色散补偿链路上的C波段64-Gbit/s强度调制直接检测（IM/DD）光开关键控（OOK）系统，提出了自适应信道匹配检测（ACMD）方法。所提出的ACMD可基于信道与噪声特性自适应补偿大部分链路失真，它包含多项式非线性均衡器（PNLE）、判决反馈均衡器（DFE）以及最大似然序列估计（MLSE）。基于信道特性，PNLE消除线性与非线性失真，随后的DFE补偿由色度色散导致的频谱零点。最后，基于噪声特性，后置滤波器可对噪声进行白化，以利用MLSE实现最优信号检测。据我们所知，我们实现了创纪录的100公里无色散补偿链路C波段64-Gbit/s IM/DD光OOK系统，仅在接收端使用所提出的ACMD即可达到7%硬判决前向纠错门限。综上，基于ACMD的C波段64-Gbit/s光OOK系统在未来光互连领域展现出巨大潜力。
英文摘要：
In this paper, we propose adaptive channel-matched detection (ACMD) for C-band 64-Gbit/s intensity-modulation and direct-detection (IM/DD) optical on-off keying (OOK) system over a 100-km dispersion-uncompensated link. The proposed ACMD can adaptively compensate most of the link distortions based on channel and noise characteristics, which includes a polynomial nonlinear equalizer (PNLE), a decision feedback equalizer (DFE) and maximum likelihood sequence estimation (MLSE). Based on the channel characteristics, PNLE eliminates the linear and nonlinear distortions, while the followed DFE compensates the spectral nulls caused by chromatic dispersion. Finally, based on the noise characteristics, a post filter can whiten the noise for implementing optimal signal detection using MLSE. To the best of our knowledge, we present a record C-band 64-Gbit/s IM/DD optical OOK system over a 100 km dispersion-uncompensated link achieving 7\% hard-decision forward error correction limit using only the proposed ACMD at the receiver side. In conclusion, ACMD-based C-band 64-Gbit/s optical OOK system shows great potential for future optical interconnects.
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