论文部分内容阅读
利用琼斯矩阵法研究了长单模光纤中偏振模色散的仿真模型 .考虑到偏振模色散的随机性 ,该模型中单模光纤被看作是一系列短双折射光纤段的级联 ,相邻两段之间耦合角是随机的 研究结果表明 ,当短双折射光纤段等长时 ,偏振模色散呈现随波长周期性变化的特点 ;不符合实际情况 当短双折射光纤段不等长且服从高斯分布时 ,周期性逐渐消失 ;当其长度均方差为均值的 2 0 % ,周期性完全消失 最后比较了偏振模色散的时域统计特性 取短双折射光纤段的长度服从高斯分布且均方差为均值的 2 0 % ,偏振模色散的统计特性接近于实际分布 .因此得出结论 :为了正确估计偏振模色散的影响 ,在单模光纤的级联模型中 ,短双折射光纤段的长度应服从高斯分布 ,均方差为其均值的 2 0 %
The Jones mode method is used to study the simulation modal of polarization mode dispersion in long single-mode fiber. Considering the randomness of polarization mode dispersion, the single-mode fiber in this model is regarded as a cascade of a series of short birefringent fiber segments, The coupling angle between two sections is random. The results show that when the short birefringent fiber length is equal, the polarization mode dispersion changes periodically with the wavelength. When the short birefringence fiber length is not equal and obeys When the Gaussian distribution, the periodicity gradually disappears. When the mean square deviation of its length is 20% of the mean, the periodical disappears completely. Finally, the statistical properties of polarization mode dispersion are compared. Taking the length of the short birefringent fiber segment as obeying the Gaussian distribution and the mean square error Is 20% of the mean, and the statistical properties of PML are close to the actual distribution. Therefore, it is concluded that in order to correctly estimate the effect of polarization mode dispersion, the length of the short birefringence fiber in the cascaded model of single- Subject to Gaussian distribution, the mean square error is 20%