In Chapter 3, fiber Bragg grating fabricated with cladding mode suppression fiber is studied.
第三章研究用包层模抑制光纤制作的光纤布拉格光栅。
Power distributions for fundamental core mode and first rank cladding modes are formulated using their field distributions.
由纤芯基模、一阶包层模式的场分布推得其功率分布 ，进一步得到两种模式的归一化常量。
Such higher order cladding mode resonances will result in ultra-broadband LPG. The possible application of such an LPG is predicted.
这种较高次包层模谐振将导致极宽带的长周期光栅，论文中还预计了这种长周期光栅未来的应用。
Since the characteristics of higher order cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
In order to calculate the equivalent step index of the periodic structure of the cladding holey optical fiber, all-vectorial fundamental space filling mode approach was utilized.
为了计算周期结构包层多孔光纤的等效阶跃折射率，采用了全矢量基本空间充填模式法。
After the simulation, the relationship of fundamental mode loss with the core index, wavelength and the diameter of cladding air holes is given.
通过模拟，给出基模损耗同芯折射率、光波长和包层空气孔直径之间的一般规律。
Based on this, we study the photosensitive inner cladding's influence on the core-mode-core-mode coupling and the core-mode-cladding-mode coupling in this kind of grating.
以此为基础，详细研究了光敏内包层对该类型光栅中存在的正向传播的纤芯基模与反向传播的纤芯基模以及与反向传播的包层模之间的耦合的影响。
The index of the core is a little smaller than that of the cladding base material, so the fundamental mode loss of short wavelength increases rapidly and leads to the mode cutoff.
这种光纤的纤芯折射率比包层基质折射率小，所以短波长时基模损耗迅速增大，使得光传输截止。
High order guided mode in double metal-cladding waveguide is more sensitive to the refractive index variation of the polymer guiding layer by comparing with low order guided mode.
双面金属包覆波导高阶导模对聚合物薄波导层的折射率变化比低阶导模更敏感。
The propagation constant increases with decreasing slab thickness for the first-order oscillating mode, which is different from that in traditional metal-cladding waveguides.
一阶振荡导模的传播常数随着平板厚度的减小而增加，此性质与传统的金属包覆波导不同。
The propagation constant increases with decreasing slab thickness for the first-order oscillating mode, which is different from that in traditional metal-cladding waveguides.
一阶振荡导模的传播常数随着平板厚度的减小而增加，此性质与传统的金属包覆波导不同。
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