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Proceedings Paper

A spectrally efficient linear polarization coding scheme for fiber nonlinearity compensation in CO-OFDM systems
Author(s): O. S. Sunish Kumar; O. A. Dobre; R. Venkatesan; S. K. Wilson; O. Omomukuyo; A. Amari; D. Chang
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Paper Abstract

In this paper, we propose a linear polarization coding scheme (LPC) combined with the phase conjugated twin signals (PCTS) technique, referred to as LPC-PCTS, for fiber nonlinearity mitigation in coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. The LPC linearly combines the data symbols on the adjacent subcarriers of the OFDM symbol, one at full amplitude and the other at half amplitude. The linearly coded data is then transmitted as phase conjugate pairs on the same subcarriers of the two OFDM symbols on the two orthogonal polarizations. The nonlinear distortions added to these subcarriers are essentially anti-correlated, since they carry phase conjugate pairs of data. At the receiver, the coherent superposition of the information symbols received on these pairs of subcarriers eventually leads to the cancellation of the nonlinear distortions. We conducted numerical simulation of a single channel 200 Gb/s CO-OFDM system employing the LPC-PCTS technique. The results show that a Q-factor improvement of 2.3 dB and 1.7 dB with and without the dispersion symmetry, respectively, when compared to the recently proposed phase conjugated subcarrier coding (PCSC) technique, at an average launch power of 3 dBm. In addition, our proposed LPCPCTS technique shows a significant performance improvement when compared to the 16-quadrature amplitude modulation (QAM) with phase conjugated twin waves (PCTW) scheme, at the same spectral efficiency, for an uncompensated transmission distance of 2800 km.

Paper Details

Date Published: 28 January 2017
PDF: 10 pages
Proc. SPIE 10130, Next-Generation Optical Communication: Components, Sub-Systems, and Systems VI, 101300P (28 January 2017); doi: 10.1117/12.2252735
Show Author Affiliations
O. S. Sunish Kumar, Memorial Univ. (Canada)
O. A. Dobre, Memorial Univ. (Canada)
R. Venkatesan, Memorial Univ. (Canada)
S. K. Wilson, Santa Clara Univ. (United States)
O. Omomukuyo, Memorial Univ. (Canada)
A. Amari, Memorial Univ. (Canada)
D. Chang, Memorial Univ. (Canada)

Published in SPIE Proceedings Vol. 10130:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems VI
Guifang Li; Xiang Zhou, Editor(s)

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