Improved polarization dependent loss tolerance for polarization multiplexed coherent optical systems by polarization pairwise coding

Chen Zhu, Binhuang Song, William Peter Corcoran, Leimeng Zhuang, Arthur Lowery

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)


Polarization dependent loss (PDL) causes imbalanced optical
signal to noise ratio (OSNR) of the two polarizations, thus remains one of
the major bottlenecks for next-generation polarization-division-multiplexed
(PDM) coherent optical transmission systems. In this paper, we investigate Pairwise Coding for adaptive PDL mitigation in PDM coherent optical systems. By pre-coding across two polarizations, the PDL-induced performance degradation can be largely mitigated without any coding overhead. We present details of the coding and de-coding design, and also derive the analytical symbol/bit error rate of the Polarization Pairwise Coding scheme, which can be used to predict the performance gain as well as for optimal rotation angle calculation. Simulation results verify that
Pairwise Coding achieves substantial system performance gains over a wide range of PDL values. Compared with other digital coding techniques, Polarization Pairwise Coding shows improved performance than Walsh-Hadamard transform since it maximizes the coordinate diversity; and also Pairwise Coding is computationally much simpler to decode compared with
the Golden and Silver Codes, therefore is practical for current 100-Gb/s and future 400-Gb/s and 1-Tb/s digital coherent transceivers.
Original languageEnglish
Pages (from-to)27434 - 27447
Number of pages14
JournalOptics Express
Issue number21
Publication statusPublished - 2015

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