The PMD in singlemode fiber, including the relationships between PMD and the circular asymmetries of geometry and stress in fiber, the influence of mode coupling on PMD, are discussed.
讨论了单模光纤的偏振模色散PMD，包括PMD与单模光纤的几何尺寸及应力的非圆对称的关系；模间耦合的影响。
Many companies also are installing a combination of singlemode and multimode fiber in backbones.
还有许多公司在主干网中结合安装单模和多模光纤。
Many companies also are installing a combination of singlemode and multimode fiber in backbones.
还有许多公司在主干网中结合安装单模和多模光纤。
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