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根据保偏光纤侧视成像定轴原理,应用光线追迹方法,分析了保偏光纤侧视成像定轴过程,模拟考察了熊猫型保偏光纤侧视成像的光强分布与偏振轴方位角及物平面位置的关系。对比仿真结果和实验观测结果,对五指型光强分布特征值判断法进行了改进。比较了透镜效应侧视成像的不同定轴方法,发现改进的五指型光强分布特征值判断法的特征值在90°位置附近具有更高的定轴精度,更易于实现保偏光纤偏振主轴的定位。这种方法适用于制作保偏光纤耦合器和保偏光纤偏振器时,在偏振主轴0°或90°方位角时的高精度定轴。
According to the principle of side-view imaging axis of polarization-maintaining fiber, ray-tracing method was used to analyze the side-looking imaging axis of polarization-maintaining fiber. The light intensity distribution and azimuth angle of polarization axis of the Panda polarization- The relationship between the object plane position. Comparing the simulation results with the experimental observations, the eigenvalue determination of five-finger light intensity distribution is improved. The different fixed-axis method of lens effect side-view imaging is compared. It is found that the eigenvalue of the improved five-finger light intensity distribution eigenvalue determination method has higher fixed-axis accuracy near 90 ° and is easier to realize polarization polarization axis Positioning. This method is suitable for the production of polarization-maintaining fiber-optic couplers and polarization-maintaining fiber-optic polarizers with a high-precision fixed axis at 0 ° or 90 ° of the polarization axis.