偏振分集相干光OFDM通信系统中的相位噪声消除  

Phase Noise Cancellation for Coherent Optical OFDM System Based on Polarization Diversity

作　　者：余骏[1] 黄鸣柳[1] 邹垚昭[1] 王旺[1] 宋英雄[1] 

机构地区：[1]上海大学通信与信息工程学院特种光纤与光接入网重点实验室,上海200072

出　　处：《光学学报》2016年第8期27-31,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61132004;61275073;61420106011);上海科学技术发展基金(13JC1402600;14511100100;15511105400;15530500600)

摘　　要：提出了一种基于偏振分集的相干光正交频分复用(OFDM)链路。然而相干检测对相位噪声比较敏感,偏振分集接收过程又会产生额外的乘性相位噪声,因此基于偏振分集相干光OFDM系统,提出了基于数字信号处理的相位噪声消除方案。在100km单模光纤中,以8Gbit/s的传输速率零误码传输16进制正交振幅调制OFDM信号,经相干检测之后,基于数字信号处理,对相干光OFDM信号完成了相位噪声消除,并对相位噪声消除后的信号星座图进行了实验结果分析。另外,还将经过相位噪声消除后的偏振分集相干光OFDM链路与其他相干光OFDM链路方案进行了性能对比,从而验证了此方案的优越性。The coherent optical orthogonal frequency division multiplexing（OFDM）system based on polarization diversity is proposed.However,the coherent detection is very sensitive to phase noise and the polarization diversity reception can produce additional multiplicative phase noise.Therefore,aphase noise cancellation scheme based on digital signal processor with coherent optical OFDM system is proposed.Error-free transmission of an 8Gbit/s 16 quadrature amplitude modulation OFDM signal over a 100 km single mode fiber is experimentally demonstrated.After the coherent detection,the phase noise through digital signal processing is cancelled,and the experimental constellation diagrams of the signals after phase noise cancellation is analyzed.In addition,the coherent optical OFDM link based on polarization diversity after phase noise cancelling is compared with other coherent optical OFDM link as the advantage of this scheme is verified.

关 键 词：光纤光学 相干接收机 偏振分集 正交频分复用 数字信号处理 相位噪声 

分 类 号：TN911.74[电子电信—通信与信息系统]