高速相干光通信系统中残留色散均衡器研究  

Investigation of Residual Chromatic Dispersion Equalizer in High-speed Optical Coherent Communication Systems

作　　者：张虎[1] 陈健[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《光子学报》2014年第9期27-31,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61271239)资助

摘　　要：在高速相干光通信系统中,完全使用电子色散补偿时会引入均衡增强相位噪声.本文提出在已有10Gbit/s光纤通信链路上使用电子色散补偿来补偿残留色散的混合色散补偿方案,实现了特定通道100Gbit/s以上高速数据传输.使用虚拟光学仪器软件仿真了在112Gbit/s相干光通信系统中,分别采用有限脉冲响应均衡器和重叠频域均衡器对现有光纤信道进行残留色散补偿后的系统性能.仿真结果表明:相同的抽头长度下,有限脉冲响应均衡器相比重叠频域均衡器有更好的残留色散补偿能力,并且有限脉冲响应均衡器均衡性能更稳定而且计算复杂度更低.因而,有限脉冲响应均衡器相较于重叠频域均衡器更适于混合色散补偿.The equalization-enhanced phase noise was introduced when fully using electronic dispersion compensation in high-speed optical coherent communication system. Using electronic dispersion compensation to compensate the residual chromatic dispersion was proposed, to realize the transmission at 100 Gbit/s per specified channel and beyond on the existing 10 Obit/s fiber-optic transmission line were realized. By using VPI, the 112 Gbit/s optical coherent system performance with finite impulse response filter and overlap frequency domain equalization filter were compared, which is used to compensate the residual chromatic dispersion. Simulation results indicate that in the same tap length, FIR has more effective residual chromatic dispersion compensation ability than overlap frequency domain equalization. Also, the finite impulse response filter has more stable equalization performance and lower computation complexity, and it is suitable for the hybrid chromatic dispersion compensation.

关 键 词：光通信 残留色散补偿 数字滤波器 色散 相干检测 相位调制 相位噪声 

分 类 号：TN929.11[电子电信—通信与信息系统]