Electrical constant envelope signals for nonlinearity mitigation in coherent-detection orthogonal frequency-division multiplexing systems

Esequiel da V. Pereira; Vinicius O. C. Dias; Helder R. O. Rocha; Marcelo E. V. Segatto; Jair A. L. Silva

doi:10.1117/1.OE.56.6.066101

1 June 2017 Electrical constant envelope signals for nonlinearity mitigation in coherent-detection orthogonal frequency-division multiplexing systems

Esequiel da V. Pereira, Vinicius O. C. Dias, Helder R. O. Rocha, Marcelo E. V. Segatto, Jair A. L. Silva

Author Affiliations +

Optical Engineering, Vol. 56, Issue 6, 066101 (June 2017). https://doi.org/10.1117/1.OE.56.6.066101

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 2πh=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.

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Esequiel da V. Pereira, Vinicius O. C. Dias, Helder R. O. Rocha, Marcelo E. V. Segatto, and Jair A. L. Silva "Electrical constant envelope signals for nonlinearity mitigation in coherent-detection orthogonal frequency-division multiplexing systems," Optical Engineering 56(6), 066101 (1 June 2017). https://doi.org/10.1117/1.OE.56.6.066101

Received: 23 February 2017; Accepted: 17 May 2017; Published: 1 June 2017

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