基于FBG解复用的PON下行传输系统的仿真分析

Modeling and simulation of the PON downlink transmission systems based on FBG demultiplex

为了探索提高无源光网络的传输质量的方法,采用将光纤布喇格光栅与密集波分复用结合的方法,提出了一个基于光纤布喇格光栅解复用的无源光网络下行系统,进行了理论分析并利用OptiSystem对该系统进行了仿真,从信道串扰、误比特特性等多方面测试了系统的传输特性,分析了影响传输性能的因素。在与现有的WDM-PON系统对比后发现,本方案有更高的边模抑制比和Q因子以及更低的误比特率。结果表明,该系统性能优异,较现有其它方案有一定的提升。

In order to seek for ways to improve the transmission quality of passive optical network,firstly,combining fiber Bragg grating（FBG）with wavelength division multiplexing passive optical network（WDM-PON）,a PON downlink transmission system was designed based on FBG demultiplex.Secondly,theoretical analysis was carried out,and simulation was conducted for the system with OptiSystem.Finally,the transmission characteristics of the system were tested in terms of channel crosstalk,bit error features etc,and the factors affecting the transmission performance were analyzed.Compared with one current WDM-PON systems,this system turns out to have higher side mode suppression ratio and Q-factor,and lower bit error rate.The result shows that this system performs well and achieves certain promotion compared with other current systems.