Chow C W, Wang C H, Yeh C H, Chi S
Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300-10, Taiwan.
Opt Express. 2011 May 23;19(11):10973-8. doi: 10.1364/OE.19.010973.
By using the carrier-suppressed single-sideband (CS-SSB) modulation, the Rayleigh backscattering (RB) experienced by the uplink signal can be effectively mitigated due to the reduction of the spectral overlap between the uplink signal and the distributed optical carrier. In this work, we first introduce the theoretical analysis of the CS-SSB generation using the dual-drive MZM (DD-MZM)-based and a dual-parallel MZM (DP-MZM)-based optical networking units (ONUs). Due to the different modulation mechanisms of the two CS-SSB modulations, the frequency components of the generated CS-SSB signals are also different. The transmission performance and the dispersion tolerance of the uplink signals generated by the two CS-SSB modulators are also analyzed and discussed.
通过使用载波抑制单边带（CS-SSB）调制，由于上行链路信号与分布式光载波之间频谱重叠的减少，上行链路信号所经历的瑞利背向散射（RB）可以得到有效缓解。在这项工作中，我们首先介绍了基于双驱动马赫-曾德尔调制器（DD-MZM）和基于双并行马赫-曾德尔调制器（DP-MZM）的光网络单元（ONU）产生CS-SSB的理论分析。由于两种CS-SSB调制的调制机制不同，所产生的CS-SSB信号的频率成分也不同。还对两种CS-SSB调制器产生的上行链路信号的传输性能和色散容限进行了分析和讨论。
