Li An, Che Di, Chen Vivian, Shieh William
Opt Express. 2014 Jun 30;22(13):15662-7. doi: 10.1364/OE.22.015662.
We propose a novel detection scheme called Stokes vector direct detection (SV-DD) to realize high electrical spectral efficiency and cost-effective optical communication for short and medium reach. With SV-DD, the signal is modulated in only one polarization and combined with the carrier in the orthogonal polarization for fiber transmission. At reception, the combined signal is detected in Stokes space by three or four photo-detectors. Compared with conventional DD technique, SV-DD is resilient to both chromatic dispersion and signal-to-signal beat noise. Furthermore, SV-DD does not require polarization tracking or narrow band optical filtering for carrier extraction. In this paper, we present for the first time the numerical analysis and experimental demonstration of single-carrier SV-DD. We report 62.5-Gb/s data rate single-carrier SV-DD transmission over 160-km SSMF using 12.5-Gbaud 32-QAM modulation.
我们提出了一种名为斯托克斯矢量直接检测（SV-DD）的新型检测方案，以实现中短距离的高电频谱效率和高性价比光通信。采用SV-DD时，信号仅在一个偏振态中进行调制，并与正交偏振态中的载波相结合用于光纤传输。在接收端，通过三个或四个光电探测器在斯托克斯空间中检测组合信号。与传统的直接检测技术相比，SV-DD对色散和信号间拍频噪声均具有抗性。此外，SV-DD不需要用于载波提取的偏振跟踪或窄带光学滤波。在本文中，我们首次展示了单载波SV-DD的数值分析和实验演示。我们报告了使用12.5-Gbaud 32-QAM调制在160公里标准单模光纤上实现62.5-Gb/s数据速率的单载波SV-DD传输。
