传导模

第三章，在已得到的光纤所有传导模传播常数的基础上，利用光纤功率耦合方程建立仿真模型，模拟计算了聚合物光纤的传输带宽、差分模式损耗（DMA）和色散等性能。

In the third chapter , based on the results achieved in chapter 2 , POF performances , such as differential mode attenuation ( DMA ), dispersion and bandwidth , are calculated by using mode power couple equations .

不同晶格光子晶体异质结的界面传导模

Guide modes at interface of photonic crystal heterostructures composed of different lattices

光子晶体中的反常色散和传导模

Anomalous Dispersion and Guide Modes in the Photonic Crystals

光子晶体异质结界面畸变与传导模

The Influence of Distortion at the Interface of Photonic Crystal Heterostructures on Guide Modes

进一步对三种异质结进行研究，得出传导模的出现不只是晶格结构畸变一种情况可以产生，其他两种异质结也能产生传导模。

It is further shown that guide modes appear not only in the case of lattice structure aberrance but also in the other two cases .

并用平面波展开加超元胞方法计算了它们的光子带隙结构，发现了理想的界面传导模。

The photonic band structures are calculated by use of the plane wave expansion method in combination with supercell technique and the guide modes at interface are investigated .

结果表明：前两种异质结中不存在界面态，必须将两个子晶格沿着界面横向拉开或者侧向滑移才能在带隙中产生传导模。

Results show that localized interface states are absent in the former two heterostructures , they can be created either by lateral lattice slipping or by increasing the interface separation ;

多模光纤的折射近场法和近场扫描法均是以纤芯半径处数值孔径不同，对应的折射模和传导模不同为依据来进行测量的。

The reason is that the multi-mode fiber refracted-ray method and near-field scanning method are all based on the numerical apertures of various radii and the corresponding refractive patterns and propagation patterns .

以二维铝圆柱/空气体系正方格子声子晶体为研究对象，采用平面波法结合超元胞的方法研究了声子晶体同质位错结的传导模。

The transmitting mode of the homogeneous dislocation junction of the photonic crystal , which is composed of two dimensional aluminum cylinders and a square lattice of air was studied with the plane-wave and super cell method .

推导了左手材料薄板波导中传导模的色散方程，分析了波导中存在传导模与波导材料和包敷材料参数取值范围之间的关系。

This paper derived the dispersion equations for the guided modes in left-handed materials ( LHM ) slab waveguides , and obtained the relationships between the existing guided modes and the parameter values of the core materials ( LHM ) and the cladding materials .

然后分析了干扰信号的传导途径，即共模传导和差模传导。

Then , this paper analyzed the differential-mode conduction and common-mode conduction of noise .