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Characterization of long-haul 112Gbit/s PDM-QAM-16 transmission with and without digital nonlinearity compensation

Makovejs, S; Millar, DS; Lavery, D; Behrens, C; Killey, RI; Savory, SJ; Bayvel, P; (2010) Characterization of long-haul 112Gbit/s PDM-QAM-16 transmission with and without digital nonlinearity compensation. OPT EXPRESS , 18 (12) 12939 - 12947. Gold open access

Abstract

In this paper long-haul, single channel, polarization multiplexed 16-state quadrature amplitude modulation (PDM-QAM-16) transmission at 112Gbit/s is investigated. Novel digital signal processing techniques are used to perform carrier phase estimation and symbol estimation, in combination with nonlinear digital backpropagation. The results obtained demonstrate that the use of digital nonlinear backpropagation increases the optimum launch power from -4dBm to -1dBm with a consequent increase in maximum reach from 1440km to 2400km, which is a record transmission distance for QAM-16 reported to date for an SMF link with EDFAs only. Furthermore, experimental measurements are supported by simulations, based on the link used in the experiment. (C) 2010 Optical Society of America

Type:Article
Title:Characterization of long-haul 112Gbit/s PDM-QAM-16 transmission with and without digital nonlinearity compensation
Open access status:An open access publication
Publisher version:http://www.opticsexpress.org
Keywords:COHERENT RECEIVER, PDM-QPSK, 16-QAM
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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