Hole-assisted fiber and photonic crystal fiber have very good bending performance, but it is dismatching with standard singlemode fiber, and it is very difficult for produce.
孔助光纤(HAF)和光子晶体光纤(PCF)的抗弯曲性能非常好,但和传统的单模光纤接续时不匹配,制造工艺非常复杂。
参考来源 - 低弯曲损耗光纤的分析测试及其在FTTH中的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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