Per-symbol-based digital back-propagation approach for PDM-CO-OFDM transmission systems

Wei Ren Peng*, Hidenori Takahashi, Itsuro Morita, Takehiro Tsuritani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


For polarization-division-multiplexing coherent optical orthogonal frequency division multiplexing (PDM-CO-OFDM) systems, we propose a per-symbol-based digital back-propagation (DBP) approach which, after cyclic prefix removal, conducts DBP for each OFDM symbol. Compared with previous DBP, this new proposal avoids the use of inefficient overlap-and-add operation and saves one fast Fourier transform (FFT) module, therefore simplifying the hardware implementation. Transmitting a 16-QAM, 42.8-Gb/s PDM-CO-OFDM signal over 960-km standard single mode fiber (SSMF), we compare the previous and the proposed DBP approaches with different receiver's sampling rates and different step lengths in each DBP iteration, and found that the proposed DBP can achieve a similar performance as that of the previous DBP while enjoying a simpler implementation. We have also specifically introduced a small self-phase modulation (SPM) model for DBP and demonstrated its feasibility with the same experimental setup.

Original languageEnglish
Pages (from-to)1547-1554
Number of pages8
JournalOptics Express
Issue number2
Publication statusPublished - 2013 Jan 28
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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