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。
2
Including surface wave, singlemode, multimode radiation, the radiation Angle, radiation pattern and so on.
包括表面波、单模、多模辐射，辐射角，辐射方向图等等。
3
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.