Faraday效应的脉冲磁场传感器中光偏振态的演化

用Jones矩阵法推导了基于Faraday效应的脉冲磁场传感器输出偏振光的方位角和椭率角，并采用Poincaré球法描述了传感器中光偏振态的演化，解决了代数表达式不能直观描述光偏振态变化过程的问题。数值仿真了线双折射率和起偏角参数对输出光偏振态的影响。提出了新的消除线双折射率对脉冲磁场测量值影响的四光路检测法，并计算了运用四光路检测法的磁场传感器输出值。

Evolution of Output Light SOP in Pulsed Magnetic Field Sensor Based-on Faraday Effect

The azimuth angle and elliptic of the pulsed magnetic field sensor output light based-on Faraday effect were derived with the Jones matrix. The evolution of output light state of polarization (SOP) was described on the Poincaré Sphere method. It does illustrate what is really happening in the sensor. The output SOP effects of the linear birefringent in Faraday materials and azimuth of the polarizer were simulated, respectively. At same time, a new method of four light path measurement was proposed to eliminate disturbing linear birefringent effects on the pulsed magnetic field sensor and magnetic field output of sensor applying four light path measurement was also calculated.