Nonlinearity-tolerant transmission using modified phase-conjugate twin wave for M-PSK signals
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Xiaogang Tong
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Wei Huang
Abstract
Using modified phase-conjugate twin wave (M-PCTW) scheme, in which additional information bits are modulated one of the conjugated wave, is helpful to increase the spectral efficiency (SE) of the conventional PCTW scheme. In this paper, we show that the phase modulated formats, but not the conventional square QAM formats are more suitable to M-PCTW scheme. Results of 1600 km nonlinear transmission show that for polarization multiplexed (PM) 8-PSK format, performance improvement from M-PCTW is about 3.3 dB, while it is about 2.2 dB for PM 8-QAM formats. For PM 16-PSK (QAM) modulation, performance improvement from M-PCTW is about 3.4 dB and 1.6 dB, respectively.
Funding source: Taiyuan unveils top projects
Award Identifier / Grant number: 2024TYJB0126
Funding source: Shanxi province for returned students
Award Identifier / Grant number: 2021-154
Funding source: Youth Project of Shanxi Basic Research Program
Award Identifier / Grant number: 202203021212325
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no competing interests.
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Research funding: Youth Project of Shanxi Basic Research Program 202203021212325, Project supported by Shanxi province for returned students 2021-154 and Taiyuan unveils top projects 2024TYJB0126.
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Data availability: Not applicable.
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