线性双折射色散对OCS灵敏度影响的理论研究

Theoretical Study of the Dispersion Effect of Linear Birefringenceupon the Sensitivity of an Optical Current Sensor

以琼斯矩阵为数学工具 ,利用理论分析和计算机仿真的方法研究了线性双折射的色散特性及其对光学电流传感器灵敏度的影响 在光学电流传感器系统中 ,光源的驱动电流与环境温度改变 ,都会造成光源峰值波长移动 由于光学玻璃材料线性双折射的色散特性 ,会使光学电流传感器的灵敏度随光源波长的变化而改变 研究结果表明 ,线性双折射的色散特性会对输出曲线的尺度因子产生影响 ,但是影响很小可以忽略

The dispersion properties of linear birefringence and its effect upon the sensitivity of a bulk-glass optical current sensor are theoretically analyzed taking the Jones' Matrix as a mathematical tool and simulated with a computer. The peak wavelength of the optical source used in an optical current sensing system will be changed by the fluctuations of the driving current or its ambient temperature. This will result in the fluctuation of the sensitivity of the system because of the dispersion of the linear birefringence existing inside the sensing head. The investigation results show that the dispersion will affect the scale factor of the system. But the effect is so small that can be omitted. These results might be useful for the researchers and designers working in the optical current sensing techniques area.