根据耦合模理论和琼斯矩阵与斯托克斯矢量的关系给出单模均匀光纤布拉格光栅(FBG)反射和透射斯托克斯参量公式，数值模拟出低双折射单模光纤均匀FBG在不同双折射值下反射和透射斯托克斯参量随波长变化的曲线。结果显示4个归一化斯托克斯参量中，s1关于中心波长λ0呈反对称分布，S0，s2和s3关于λ0呈对称分布；双折射值增大谱线不产生漂移，但谱线反射带宽变窄，反射信号与透射信号斯托克斯参量振幅均有不同程度的变化，表明双折射值对斯托克斯参量的影响非常显著。测出单模光纤均匀FBG反射和透射斯托克斯参量随波长变化曲线，理论分析与实验结果基本符合。

Based on the coupled-mode theory and the relation between Jones matrix and Stokes vector, we give the formulas for reflected and transmitted Stokes parameters of low-birefringence single-mode uniform optical fiber Bragg grating (FBG). The curves of reflected and transmitted Stokes parameters versus wavelength of low-birefringence single-mode uniform FBG are simulated under different birefringence values. The results show that: among the four normalized Stokes parameters, s1 is antisymmetric about the central wavelength λ0, S0, s2 and s3 are symmetric about λ0. Although spectral lines do not produce a drift, the bandwidth of reflected signals is narrowed with the growing of birefringence values. The Stokes amplitudes of reflected and transmitted signals have different changes. It is shown that birefringence values have significant influences on Stokes parameters. The curves of reflected and transmitted Stokes parameters versus the parameters of single-mode uniform FBG are measured. The theoretical analysis and experimental results coincide with each other.