论文部分内容阅读
为提高光纤电流传感器的标度因数稳定性,从传感光纤与光纤1/4波片熔接时的方位角出发,研究了方位角的优化对光纤内线性双折射变化的抑制作用,指出了现有方位角优化方法中忽略的因素旋光角,并结合旋光角这一变量建立了更加精确的琼斯矩阵模型。仿真分析了在不同方位角与旋光角条件下,线性双折射对标度因数稳定性的影响。通过仿真结果的对比发现,在考虑旋光角之后,现有算法的方位角优化值误差较大;还发现在特定的旋光角条件下,线性双折射的变化对标度因数无影响。基于此提出了方位角与旋光角的综合优化方法,降低了对光纤制造工艺的要求,有效提高了系统标度因数的稳定性。
In order to improve the stability of scale factor of fiber optic current sensor, the effect of azimuth optimization on the change of linear birefringence in fiber was studied based on the azimuth angle when the sensing fiber and ¼ wave plate of fiber were fused. There is a neglected factor of rotation angle in the azimuth optimization method and a more accurate Jones matrix model is established in combination with the variable of the rotation angle. The effects of linear birefringence on the stability of scaling factor under different azimuth and rotation angles are simulated. The simulation results show that, considering the rotation angle, the azimuth optimization error of the existing algorithm is relatively large. It is also found that the linear birefringence has no effect on the scale factor under the specific rotation angle. Based on this, a comprehensive optimization method of azimuth angle and rotation angle is proposed, which reduces the requirement of optical fiber manufacturing process and effectively improves the stability of the system scaling factor.