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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Single wavelength twin-SSB direct detection system based on Kramers-Kronig receiver and time-interleaved OFDM frame
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Single wavelength twin-SSB direct detection system based on Kramers-Kronig receiver and time-interleaved OFDM frame

机译:基于Kramers-Kronig接收机的单波长双SSB直接检测系统和时间交错OFDM帧

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摘要

In this paper, we propose a spectrally efficient and cost-effective twin-SSB OFDM system based on Kramers-Kronig optical phase reconstruction and time-interleaved frame (TIF). C-band transmission over 80 km SSMF with a net bit rate of 88.5 Gb/s using 40 GSa/s DACs is experimentally demonstrated with a BER threshold of 3.8e-3. Two optical filters are employed to separate the two sidebands at the receiver. The imperfection of filter transfer function introduces crosstalk between them, which can be mitigated by the TIF. The impact of optical filter parameters, including roll-off, bandwidth and center frequency shift, are studied and analyzed in detail by simulation. We show that the roll-off determines the required size of TIF, and the optical fiber bandwidth leads to tradeoff between carrier-to-signal power ratio and spectral efficiency. Finally, the optimization and tolerance range of the filter center frequency shift are numerically evaluated.
机译:在本文中,我们提出了一种基于Kramers-Kronig光学相位重建和时间交错框架(TIF)的光谱有效且经济高效的双SSB OFDM系统。 通过3.8E-3的BER阈值,通过3.8E-3的BER阈值进行实验证明了88.5 GB / s的净比特率超过80km的C波段。 采用两个光学滤波器在接收器处分离两个边带。 滤波器传递函数的缺陷引入它们之间的串扰,可以通过TIF来减轻。 通过仿真研究和分析了光学滤波器参数的影响,包括卷降,带宽和中心频移,并详细分析。 我们表明,滚动确定了TIF的所需尺寸,光纤带宽导致载波到信号功率比和光谱效率之间的折衷。 最后,滤波器中心频移的优化和公差范围在数值上进行了数值评估。

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