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为了提高基于SOA-MZI结构的全光异或门的输出消光比,优化系统性能,将SOA和HNLF相结合,在光通信系统设计软件OptiSystem7.0仿真平台上搭建了基于SOA-MZI的全光异或仿真实验模型,对两路40 Gbit/s的RZ码数据信号进行了全光异或仿真实验。利用HNLF的非线性效应设计了一种优化结构对基于SOA-MZI的全光异或输出信号进行优化,并对优化前后的信号时域波形图和系统眼图进行了比较分析,通过多次反复实验得到一组最佳的系统参数,使得基于SOA-MZI的全光异或门的输出消光比从10 dB提高到约28 dB。实验结果表明:常规的基于SOA-MZI的全光异或门由于相消干涉不彻底造成输出消光比较低,而经过优化,很好地解决了这种问题,提高了异或输出消光比,优化了系统性能。
In order to improve the output extinction ratio of all-optical XOR gate based on SOA-MZI structure and optimize the system performance, SOA and HNLF are combined to build an all-optical based on SOA-MZI on OptiSystem7.0 simulation platform of optical communication system design software XOR simulation experiment model is used to experiment on all-optical XOR of two 40 Gbit / s RZ code data signals. An optimization structure is designed based on the nonlinear effect of HNLF to optimize the all-optical XOR output signal based on SOA-MZI. The signal time-domain waveforms and system eye diagrams before and after optimization are compared and analyzed. The experiment results in a set of optimal system parameters, and the output extinction ratio of the all-optical XOR gate based on SOA-MZI is increased from 10 dB to about 28 dB. The experimental results show that the conventional all-optical XOR gate based on SOA-MZI solves this problem by optimizing the output extinction ratio due to the incomplete destructive interference, and improves the extinction ratio of XOR output, and optimizes The system performance.