在均匀格点的基础上，给出了基于柱坐标的全矢量非均匀格点有限差分方法(FDM)，并采用了完美匹配层(PML)边界条件。
A general formula is derived for a finite-difference method (FDM) with non-uniform grids in a cylindrical coordinate system, and a perfectly matched layer (PML) is used for the boundary treatment.
当非均匀应变场作用在光纤布拉格光栅（FBG）上时，由于FBG周期和有效折射率在沿FBG长度方向都为变量，所以会导致光谱形状的变化。
The spectrum of fiber Bragg grating(FBG) in inhomogeneous strain fields is distorted due to its inhomogeneity of both the periods and the effective refractive index.
当非均匀应变场作用在光纤布拉格光栅（FBG）上时，由于FBG周期和有效折射率在沿FBG长度方向都为变量，所以会导致光谱形状的变化。
The spectrum of fiber Bragg grating(FBG) in inhomogeneous strain fields is distorted due to its inhomogeneity of both the periods and the effective refractive index.
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