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采用多重重要抽样方法,研究了受偏振模式色散和偏振相关损耗损伤的10Gbit/s光通信系统的功率代价和失效概率.仿真结果表明,光滤波器对功率代价有重要影响.采用法布里-珀罗滤波器的系统比采用四阶高斯型滤波器的系统有更好的性能表现;发现功率代价通常随着啁啾因子的增大而增大,但当啁啾因子为0.5左右时,系统性能达到最好.仿真结果也表明,即使偏振模式色散和偏振相关损耗同时存在,DPSK系统比OOK系统有更强的PMD和PDL耐受性.
The power cost and the failure probability of 10Gbit / s optical communication systems affected by polarization mode dispersion and polarization-dependent loss are studied by multiple important sampling methods.The simulation results show that the optical filter has an important impact on the power cost.The Fabry- Perot filter system has better performance than the system using fourth-order Gaussian filter; found that the power cost usually increases with the increase of chirp factor, but when the chirp factor is about 0.5, the system And the performance is best.The simulation results also show that the DPSK system has better PMD and PDL tolerance than the OOK system even though polarization mode dispersion and polarization dependent loss exist at the same time.