Clock Recovery Challenges in DSP-Based Coherent Single-Mode and Multi-Mode Optical Systems

Future Internet

Darko Zibar¹  Francesco Da Ros¹  JúlioCésar Medeiros Diniz¹ 

[1] DTU Fotonik, Technical University of Denmark, Ørsteds Plads 343, 2800 Kongens Lyngby, Denmark;

关键词: optical communications;    clock recovery;    space-division multiplexing;    coherent communications;   

DOI  :  10.3390/fi10070059

来源: DOAJ

【 摘 要 】

We present an analysis of clock recovery algorithms in both polarization division multiplexing systems and mode division multiplexing systems. The impact of inter-polarization time skew and polarization mode dispersion in single-mode fibers, as well as the combined impact of mode mixing and mode group delay spread in multi-mode fibers under different coupling regimes are investigated. Results show that although the clock tone vanishing has a known solution for single-mode systems, in multi-mode systems even for low group delay spread, strong coupling will cause clock tone extinction, making it harder to implement an effective clock recovery scheme.

【 授权许可】

Unknown