A polarization multiplexed all-optical orthogonal frequency division multiplexing (AO-OFDM) system is investigated analytically and numerically, with 12.5 Gbaud symbol rate, that is compatible with the International Telecommunication Union flexible grid. We demonstrate that fast adaptive filtering is not require at the receiver and chromatic dispersion with polarization mode dispersion can be compensated without the cyclic prefix insertion, with the maximum spectral efficiency by using proper optical filter. System performance are numerically and analytically evaluated considering nonlinear effects and power consumption, evidencing a good agreement between the theoretical model and numerical results. We compare AO-OFDM performance with coherent OFDM scheme using the derived theoretical formula and numerical results. 21 subcarriers are investigated with quadrature phase shift keying modulation and 7 subcarriers in case of 16-quadrature amplitude modulation, with a total capacity of 976.5 Gb/s and 651 Gb/s, respectively, considering 7% forward error correction overhead.

对极化多路复用全光正交频分多路复用（AO-OFDM）系统进行了分析和数值研究，其符号率为12.5 Gbaud，与国际电信联盟的灵活网格兼容。我们证明了在接收器上不需要快速自适应滤波，并且可以通过使用适当的光学滤波器以最大的频谱效率来补偿具有偏振模色散的色散，而无需循环前缀的插入。在考虑非线性影响和功耗的情况下，对系统性能进行了数值和分析评估，表明理论模型与数值结果之间具有很好的一致性。我们使用导出的理论公式和数值结果将AO-OFDM性能与相干OFDM方案进行了比较。