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.

• 摘要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。