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 rece...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
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.
