Sotiropoulos Nikolaos, Koonen Ton, de Waardt Huug
Dept. of Electrical Engineering, COBRA Research Institute, Eindhoven University of Technology, Den Dolech 2, P.O. Box 513, NL 5600 MB Eindhoven, The Netherlands.
Opt Express. 2012 Dec 17;20(27):29096-104. doi: 10.1364/OE.20.029096.
In this paper, we propose the use of multilevel modulation formats with differential detection to enable Next-Generation Time-Division Multiplexing Passive Optical Networks (TDM-PONs). Bidirectional transmission of 30 Gb/s Differential 8 Phase-Shift Keying (D8PSK), on the downstream, and 10 Gb/s On-Off Keying (OOK), on the upstream, over a TDM-PON has been demonstrated experimentally. Furthermore, some of the functionalities that can be implemented in Digital Signal Processing (DSP) in the receiver, namely wavelength misalignment compensation, IQ imbalance mitigation and data-aided multiple symbol phase estimation, are explored. Results indicate that DSP-based incoherent multilevel formats are an attractive option for providing the high bit rates required for future TDM-PONs.
在本文中，我们提出使用具有差分检测的多级调制格式来实现下一代时分复用无源光网络（TDM-PON）。通过实验证明了在TDM-PON上实现下行30 Gb/s差分8相移键控（D8PSK）和上行10 Gb/s开关键控（OOK）的双向传输。此外，还探讨了一些可以在接收机的数字信号处理（DSP）中实现的功能，即波长失准补偿、IQ不平衡缓解和数据辅助多符号相位估计。结果表明，基于DSP的非相干多级格式是提供未来TDM-PON所需高比特率的一个有吸引力的选择。
