Open AccessTransmission of multi-polarization-multiplexed signals: another freedom to explore?
Author(s) -
Zhiyu Chen,
Lianshan Yan,
Wei Pan,
Bin Luo,
Yinghui Guo,
Haiyan Jiang,
Anlin Yi,
Yuan Sun,
Xiaoxia Wu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.011590
Subject(s) - polarization division multiplexing , polarization mode dispersion , phase shift keying , multiplexing , keying , demodulation , digital signal processing , optics , computer science , electronic engineering , polarization (electrochemistry) , gigabit , transmission (telecommunications) , signal processing , physics , telecommunications , bit error rate , optical fiber , engineering , decoding methods , channel (broadcasting) , chemistry
We propose a configuration of signal multiplexing with four polarization states, and investigate its transmission performance over single-mode-fiber links. Assisted by coherent detection and digital signal processing (DSP), the demodulation of four-polarization multiplexed (4PM) on-off-keying (OOK) and phase-shift-keying (PSK) signals are achieved. We then discuss the impact of the crosstalk from polarization mode dispersion (PMD) on 4PM systems. The transmission distance is extended from ~50-km to ~80 km by employing feedback-decision-equalizers. We also compare the back-to-back characteristics of the 40-Gbit/s 4PM-OOK system and 40-Gbit/s PDM-QPSK system with the same spectral efficiency. The results show that the performance of 4PM systems is comparable to that of PDM-QPSK systems, which indicates that the proposed scheme is a potentially promising candidate for future optical networks.