相干光正交频分复用系统(Coherent optical orthogonal frequency division multiplexing,COOFDM)作为未来高速光通信的重要解决方案,是近年来光传输领域的研究热点.高速CO-OFDM系统需要较高带宽的模数/数模转换器(DAC/ADC),目前技术水平难以达到.改进了正交频带复用技术(Orthogonal band multiplexing,OBM)的光域实现方案；结合偏振复用技术和偏振分集接收,提出了基于OBM的100 Gb/s高速CO-OFDM系统；并对系统传输性能进行数字仿真.结果表明:基于OBM技术的MIMO CO-OFDM系统可有效降低对DAC/ADC的处理速度要求,在不需任何在线色散补偿和偏振控制器件条件下,通过单模光纤传输800 km,系统Q值保持在13 dB以上.
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