Then the simplified model for the LPFG is deduced with ignoring longitudinal coupling of modes and coupling of cladding modes themselves, and also assuming the modulation of refractive index exis...
忽略轴向的模式耦合以及包层模式之间的相互耦合作用，并认为折射率指数的调制只存在于纤芯中，建立了简化的长周期光纤光栅数学模型。
A new refractive index sensing scheme based on the cladding modes of fiber Bragg grating (FBG) is presented.
提出了基于光纤布拉格光栅(FBG)包层模式的折射率传感方案。
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 concept of equivalent refractive index of cladding is introduced from the equivalent refractive index method, which can rule out the false solutions of FEM.
引入了等效折射率法中的包层等效折射率的概念，排除了有限元法计算导致的伪解。
As the refractive index of the overlay is higher than that of the cladding, the Long Period fiber Grating (LPG) element exhibits high sensitivity.
对于涂覆长周期光纤光栅(LPG)传感元件，涂覆层折射率大于包层折射率时将具有很高的灵敏度。
Resolve dispersion equation and obtain the effective refractive index of cladding using method of numerical calculation.
推导出纤芯、包层、薄膜层、环境层的场分布表达式，利用数值计算求出了包层膜的有效折射率。
Resolve dispersion equation and obtain the effective refractive index of cladding using method of numerical calculation.
推导出纤芯、包层、薄膜层、环境层的场分布表达式，利用数值计算求出了包层膜的有效折射率。
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