Use of polarization freedom beyond polarizationdivision multiplexing to support high-speed and spectral-efficient data transmission  

作　　者：Zhi-Yu Chen Lian-Shan Yan Yan Pan Lin Jiang An-Lin Yi Wei Pan Bin Luo 

机构地区：[1]Center for Information Photonics and Communications,School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Light(Science & Applications)》2016年第1期259-265,共7页光（科学与应用)（英文版）

基　　金：supported by the Natural Science Foundation of China(Nos.61335005,61325023,61275068 and 61401378);the National Basic Research Program of China(2012CB315704)。

摘　　要：Increasing the system capacity and spectral efficiency(SE)per unit bandwidth is one of the ultimate goals for data network designers,especially when using technologies compatible with current embedded fiber infrastructures.Among these,the polarizationdivision-multiplexing(PDM)scheme,which supports two independent data channels on a single wavelength with orthogonal polarization states,has become a standard one in most state-of-art telecommunication systems.Currently,however,only two polarization states(that is,PDM)can be used,setting a barrier for further SE improvement.Assisted by coherent detection and digital signal processing,we propose and experimentally demonstrate a scheme for pseudo-PDM of four states(PPDM-4)by manipulation of four linearly polarized data channels with the same wavelength.Without any modification of the fiber link,we successfully transmit a 100-Gb s−1 PPDM-4 differential-phase-shift-keying signal over a 150-km single-mode fiber link.Such a method is expected to open new possibilities to fully explore the use of polarization freedom for capacity and SE improvement over existing fiber systems.

关 键 词：coherent detection optical communication pseudo-polarization-division multiplexing spectral efficiency 

分 类 号：TN9[电子电信—信息与通信工程]