APSK Modulated CO-OFDM System With Increased Tolerance Toward Fiber Nonlinearity

An amplitude and phase-shift keying (APSK) modulated coherent optical orthogonal frequency-division-multiplexing (CO-OFDM) system is proposed, with increased tolerance toward fiber nonlinearity. Numerical simulation results, based on 30.2-Gb/s single-channel and 5×30.2-Gb/s wavelength-division-multi...

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Bibliographic Details
Published in:IEEE photonics technology letters 2012-07, Vol.24 (13), p.1085-1087
Main Authors: Wang, Hui, Li, Yan, Yi, Xiaogang, Kong, Deming, Wu, Jian, Lin, Jintong
Format: Article
Language:English
Subjects:
Amplitude and phase-shift keying (APSK)
Fiber nonlinear optics
fiber nonlinearity
Modulation
Optical fibers
orthogonal frequency-division-multiplexing (OFDM)
Peak to average power ratio
quadrature amplitude modulation (QAM)
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Summary:An amplitude and phase-shift keying (APSK) modulated coherent optical orthogonal frequency-division-multiplexing (CO-OFDM) system is proposed, with increased tolerance toward fiber nonlinearity. Numerical simulation results, based on 30.2-Gb/s single-channel and 5×30.2-Gb/s wavelength-division-multiplexing (WDM) single-polarization CO-OFDM systems, show that compared with conventional 16 quadrature amplitude modulation (QAM) modulated optical OFDM signal, the 16 APSK modulated optical OFDM signal has a higher tolerance toward fiber nonlinearity, such as self-phase modulation and cross-phase modulation. The optimal launch power and the corresponding Q 2 factor are, respectively, 2 and 0.5 dB higher than 16 QAM modulated optical OFDM signal after 640-km transmission, both in single-channel and WDM CO-OFDM systems.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2012.2194733