We experimentally realized a high-speed nested anti-resonant nodeless fiber (NANF) transmission with the assistance of the polarization division multiplexing (PDM) and probabilistic shaping (PS) technology. In this system, a low-complexity multiple-input multiple-output (MIMO) real-valued equalizer (RVE) is integrated with decision-directed carrier phase estimation (DDCPE), which is robust against the IQ cross talk and a tiny phase disturbance between PS symbols. By using the proposed MIMO-RVEDDCPE, the 60-Gbaud PDM-PS-256QAM signal has been delivered through 2-km NANF satisfying the soft-decision forward error correction (SD-FEC) threshold.

中文翻译：

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利用 MIMO 均衡器与低复杂度决策引导载波相位估计集成的高阶 QAM NANF 传输

我们借助偏分复用（PDM）和概率整形（PS）技术实验性地实现了高速嵌套式反谐振无节点光纤（NANF）传输。在该系统中，低复杂度的多输入多输出 (MIMO) 实值均衡器 (RVE) 与决策引导载波相位估计 (DDCPE) 集成，可抵抗 IQ 串扰和微小相位扰动PS 符号之间。通过使用所提出的 MIMO-RVEDDCPE，60 Gbaud PDM-PS-256QAM 信号已通过 2 公里 NANF 传输，满足软决策前向纠错 (SD-FEC) 阈值。