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Proceedings Paper

Investigation of receiver contraints on the transmission performance of 1 Tbps WDM-Nyquist and CO-OFDM signals
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Paper Abstract

In this paper, we implement an Optical Flat Comb Source generating a coherent super-channel operating at 1 Tbps using Wavelength Division Multiplexing-Nyquist (WDM-Nyquist) and Coherent Optical-Orthogonal Frequency Division Multiplexing (CO-OFDM) approaches with 12.5 GHz channel spacing. We evaluate through simulation the performance of the two techniques for generating Dual Polarization Quadrature-Amplitude Modulation based on 16 (DP-16QAM). We first study the robustness of CO-OFDM system to the receiver constraints such as Analog-to-Digital Converters (ADCs) speed and the receiver bandwidth in Back-to-Back link (Optical Signal-to- Noise Ratio (OSNR)) and over longhaul dispersion compensated links using Standard Single Mode Fiber (SSMF). We find that CO-OFDM requires 6 Samples per Symbol (SpS) with a large receiver bandwidth (2.25× Baud rate) to achieve the same performance of WDM-Nyquist system in terms of SNR. However, the CO-OFDM system needs more than 6 SpS to achieve the same distances as WDM-Nyquist. We also study the impact of the input power level in terms of OSNR for CO-OFDM and WDM-Nyquist systems in order to evaluate the robustness of both systems to the nonlinear effects.

Paper Details

Date Published: 7 February 2015
PDF: 6 pages
Proc. SPIE 9389, Next-Generation Optical Communication: Components, Sub-Systems, and Systems IV, 93890F (7 February 2015); doi: 10.1117/12.2081539
Show Author Affiliations
Abir Hraghi, Univ. of Carthage (Tunisia)
Mourad Menif, Univ. of Carthage (Tunisia)

Published in SPIE Proceedings Vol. 9389:
Next-Generation Optical Communication: Components, Sub-Systems, and Systems IV
Guifang Li; Xiang Zhou, Editor(s)

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