为实现高速光通信系统高效低成本测试的目标,基于施密特正交化过程(GSOP,Gram-Schmidt orthogonalizationprocedure),提出了一种适用于偏振复用—多进制正交幅度调制(PDM-MQAM)相干光通信系统的正交不平衡损伤估计(IQ-ImEstimation, IQ ...为实现高速光通信系统高效低成本测试的目标,基于施密特正交化过程(GSOP,Gram-Schmidt orthogonalizationprocedure),提出了一种适用于偏振复用—多进制正交幅度调制(PDM-MQAM)相干光通信系统的正交不平衡损伤估计(IQ-ImEstimation, IQ imbalance estimation)算法。根据同相信号和正交信号两路信号功率关系及相关性,设计幅度失配估计和相位失配估计2种方案。通过对34GBaudPDM-MQAM相干光通信系统进行仿真与实验,验证了IQ-ImEstimation算法的正确性和有效性。展开更多
Stokes vectors direct detection(SV-DD) is an effective solution for short-reach optical communications. In this Letter, we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector r...Stokes vectors direct detection(SV-DD) is an effective solution for short-reach optical communications. In this Letter, we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector receivers(SVRs). The influences of three key factors including the states-of-polarization(SOP), the splitting ratio of the coupler, and the excess loss(EL) are studied in detail. It is shown that the splitting ratio for achieving optimum performance will be changed with SOP and EL conditions. Among these SVRs, the3 × 3 coupler-based receiver with its optimal splitting ratio shows the best bit error rate performance and stability against the change of SOP.展开更多
文摘为实现高速光通信系统高效低成本测试的目标,基于施密特正交化过程(GSOP,Gram-Schmidt orthogonalizationprocedure),提出了一种适用于偏振复用—多进制正交幅度调制(PDM-MQAM)相干光通信系统的正交不平衡损伤估计(IQ-ImEstimation, IQ imbalance estimation)算法。根据同相信号和正交信号两路信号功率关系及相关性,设计幅度失配估计和相位失配估计2种方案。通过对34GBaudPDM-MQAM相干光通信系统进行仿真与实验,验证了IQ-ImEstimation算法的正确性和有效性。
基金supported by the National Natural Science Foundation of China(Nos.61671053,61871030,and 61435006)the Fundamental Research Funds for the Central Universities(No.FRF-BD-17-015A)+1 种基金the Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services,the State Key Laboratory of Advanced Optical Communication Systems Networks,China,the Hong Kong Polytechnic University(Nos.1-ZVGB,G-SB65,and 4-BCCK)the RGC of Hong Kong SAR Government(No.152248/15E)
文摘Stokes vectors direct detection(SV-DD) is an effective solution for short-reach optical communications. In this Letter, we investigate two-dimensional-modulation direct-detection systems based on three Stokes vector receivers(SVRs). The influences of three key factors including the states-of-polarization(SOP), the splitting ratio of the coupler, and the excess loss(EL) are studied in detail. It is shown that the splitting ratio for achieving optimum performance will be changed with SOP and EL conditions. Among these SVRs, the3 × 3 coupler-based receiver with its optimal splitting ratio shows the best bit error rate performance and stability against the change of SOP.
