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Optical Engineering

Electrical constant envelope signals for nonlinearity mitigation in coherent-detection orthogonal frequency-division multiplexing systems
Author(s): Esequiel da V. Pereira; Vinicius O. C. Dias; Helder R. O. Rocha; Marcelo E. V. Segatto; Jair A. L. Silva
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Paper Abstract

A theoretical analysis and a numerical investigation of 3-dB peak-to-average power ratio electrical constant envelope over orthogonal frequency-division multiplexing (OFDM) signals in coherent-detection optical (CO) systems are proposed. A 100 - Gb / s optical system is studied to increase the nonlinear tolerance (NLT) to both Mach–Zehnder modulation and optical propagation impairments. Simulation results show that, with 16- and 64-QAM subcarrier modulations, the proposed system outperforms a conventional CO-OFDM system, if an optical modulation index OMI = 2.5 and an electrical phase modulation index 2 π h = 3 are simultaneously adopted. The achieved NLT denoted by a performance gain of 24 dB is attractive after propagation through 1200 km of dispersion-uncompensated standard single-mode fiber, especially for 10-dBm fiber input power and despite the intrinsic bandwidth enlargement of PMs.

Paper Details

Date Published: 1 June 2017
PDF: 7 pages
Opt. Eng. 56(6) 066101 doi: 10.1117/1.OE.56.6.066101
Published in: Optical Engineering Volume 56, Issue 6
Show Author Affiliations
Esequiel da V. Pereira, Univ. Federal do Espírito Santo (Brazil)
Vinicius O. C. Dias, Univ. Federal do Espírito Santo (Brazil)
Helder R. O. Rocha, Univ. Federal do Espírito Santo (Brazil)
Marcelo E. V. Segatto, Univ. Federal do Espírito Santo (Brazil)
Jair A. L. Silva, Univ. Federal do Espírito Santo (Brazil)

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