提出了基于光纤光栅透射光斯托克斯参量测量的新型实时压力传感方法。深入分析了透射光第一斯托克斯参量和压力所致线双折射之间的单调变化关系。分析表明，入射线偏振光入射角度以及相应测量波长点的选择对系统灵敏度、线性度及动态范围有重要影响。利用光纤光栅和高速在线检偏器搭建了实时压力测量系统，实验数据验证了压力和透射光第一斯托克斯参量之间的单调变化关系，证明了此方法的可行性。最后对实验误差和系统性能进行了分析并提出了改进方案。

A novel real-time pressure measurement using Stokes parameter of fiber Bragg gratings (FBG) in transmission is proposed. It is analyzed that the first Stokes parameter of the transmitted light in FBG has monotonous relationship with linear birefringence induced by pressure. The simulations show that the choices of incident angle and the wavelength points have an important effect on the sensitivity, the linearity of the sensor and dynamic range. Experimental results obtained on fiber Bragg gratings transversally loaded by an external force confirm the simulated evolutions. The performances are analyzed and the solutions are proposed to improve the system.