以啁啾光栅对波分复用系统色散补偿的研究

Investigation on dispersion compensation by CFBG in WDM system

本文模拟设计了一个4×10 Gbit/s的波分复用系统,采用同时具有解复用器功能的级联啁啾光纤光栅对该系统进行了色散补偿。仿真中分析了系统分别在非归零码和归零码调制格式下的性能,通过仿真结果的Q因子和眼图,找出了使系统性能达到最佳的各项参数,使系统得到了优化设计。结果表明,该系统性能良好,级联的啁啾光纤光栅可以对每个波长信号进行精确的色散补偿,非归零和归零调制信号的系统最佳Q值分别为17.80和52.55。

In present research,a 4×10 Gbit/s wavelength division multiplexing(WDM)system is designed by theoretical simulation calculations to investigate the dispersion compensation.The dispersion of the system is compensated by chirp fiber Bragg gratings(CFBG).The properties of systems are investigated with the non return to zero(NRZ)and return to zero(RZ),respectively.The system is optimized by the analysis of Q factor and eye diagram obtained by theoretical simulations,and the best parameters are suggested to achieve the best performance of the system.The analysis indicates that the CFBGs can compensate different wavelength signal′s dispersion accurately,and the systems show excellent performance.the best Q value of NRZ is calculated to be 17.80,and that of RZ is calculated to be 52.55,respectively.