CUED Publications database

Mitigation of fiber nonlinearity using a digital coherent receiver

Millar, DS and Makovejs, S and Behrens, C and Hellerbrand, S and Killey, RI and Bayvel, P and Savory, SJ (2010) Mitigation of fiber nonlinearity using a digital coherent receiver. IEEE Journal on Selected Topics in Quantum Electronics, 16. pp. 1217-1226. ISSN 1077-260X

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Abstract

Coherent detection with receiver-based DSP has recently enabled the mitigation of fiber nonlinear effects. We investigate the performance benefits available from the backpropagation algorithm for polarization division multiplexed quadrature amplitude phase-shift keying (PDM-QPSK) and 16-state quadrature amplitude modulation (PDM-QAM16). The performance of the receiver using a digital backpropagation algorithm with varying nonlinear step size is characterized to determine an upper bound on the suppression of intrachannel nonlinearities in a single-channel system. The results show that for the system under investigation PDM-QPSK and PDM-QAM16 have maximum step sizes for optimal performance of 160 and 80 km, respectively. Whilst the optimal launch power is increased by 2 and 2.5 dB for PDM-QPSK and PDM-QAM16, respectively, the Q-factor is correspondingly increased by 1.6 and 1 dB, highlighting the importance of studying nonlinear compensation for higher level modulation formats. © 2010 IEEE.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:20
Last Modified: 10 Apr 2021 00:43
DOI: 10.1109/JSTQE.2010.2047247